Solving Inequalities - MathHelp.com - Algebra Help

For a complete lesson on solving inequalities, go to www.MathHelp.com - 1000+ online math lessons featuring a personal math teacher inside every lesson! In this lesson, students learn that when solving an inequality, such as --3x is less than 12, the goal is the same as when solving an equation: to get the variable by itself on one side. Note that when multiplying or dividing both sides of an inequality by a negative number, the direction of the inequality sign must be switched. For example, to solve --3x is less than 12, divide both sides by --3, to get x is greater than -4. And when graphing an inequality on a number line, less than or greater than means an open dot, and less than or equal to or greater than or equal to means a closed dot.

[@stevenrichardma]

its funny, i'll sit through 2 hour lectures and not understand, then ill watch a 2 minute video and understand.

[@nightowl154]

IKR. It's kind of sad.

[@Nica7195]

You r not the only one.

[@themathanator432]

Me too 😂

[@StvrryJ]

Same

[@charlotteminnon2885]

You not kidding

[@GatorFan216]

This guy must be a lot fun at parties

[@nafeezapawaroo2282]

Hi

[@barbaralechuga7251]

Hahahahahhaa 😂 for sure

[@jenmackay3097]

ikr.

[@brianduffy9123]

lmfao

[@dylanmonroe239]

LLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOLLLLLLLLLLLLLL

[@JTelli786]

My god, this guy sounds dead on the inside. But thanks anyway, your video really helped!

[@barbaralechuga7251]

JTelli786 anyways-

[@nicolejay4153]

Poor guy he was a victim of MATH i can tell by just listening to his voice

[@gayassvids]

XD ikr yoloswag420blazin math evreyday

[@atlive1]

that is a very poor way of yours to judge people...

[@nicolejay4153]

it was a joke , calm down.

[@atlive1]

Nicole Jay lol, it is all good...

[@midnight_bass]

set the speed to 1.5.. then he will talk like a normal human being!! XD

[@jalenbanks4596]

did you forget your coffe this morning?

[@barbaralechuga7251]

Jayla banks yessir

[@Emma-cm4rd]

Wow I sat through math class to learn nothing, then I watch this and I get everything!

[@deceasedbyphantom]

Thank you, you can teach unlike my actual math teacher.

[@someperson7628]

I didn't get it in 44min in school but got it at home in 2min....i didn't know I could daydream for 44min wow

[@libertax9213]

Thank you helped a lot with my math HW (9th grade math Honors)

[@OGBStudios]

Damn this guy needs to quit the jokes.

[@OpenThatWinder]

Holy cow crap this actually helped

[@valeriecrespo4637]

The WAY he EXAGGERATES things! Lol

[@prodblahboy85]

my moms on my case cause all i do is play csgo so i have to do this

[@TheDragonfriday]

Just study and practice with someone. The more you practice the better you get.

[@fordsonhigh23]

I know, my teacher explained it to me over and over again and finally knew how to do it, but when this guy explained for just 2:52, it felt like i was in elementary. Its really easy.THANKS MAN!!

[@rwardle13]

Thanks for the video. I have end of level testing tomorrow and I had no idea how to do these until now. Thank you.

[@espeessoqueen]

You teach way better than my algebra teacher!

[@TheFushigiFan99]

Try one.

[@kevincampbell1208]

😂😂😂

[@jacintajohnson9339]

I think hes great teacher..he make sure he understand hes students by slowing his voice down lol.

[@azzamalbraick4234]

Your Name Is Amazing

[@elfulanodetal1870]

Preach

[@elfulanodetal1870]

Lol

[@carolynrasmussen6847]

i used khan academy for so long (and they're still great) but this guy is awesome. He doesn't confuse things and I can learn something from just a two minute video!!

[@dreamsprayanimation]

whats that little emblem in the assassin symbol supposed to mean?

[@LongJohnsMateTom]

Why do you have to change the direction of the inequality sign when you divide both sides? What is the reasoning behind it?

[@kaylawatson363]

I have finals tomorrow😭

[@Yaiguess]

@christan Lockheart you are still trying to get the variable alone. Since a is being added then subtract the number it is being adds to on both ends if the equation. The answer is a is greater then 5

[@TheFigure]

Why do we flip the sign when multiplying or dividing by a negative number?

[@Topcaat]

so you only switch them when you divide by negative?? i saw a diff video said when you divide or multiply you have to switch it??

[@angelavaldez7936]

how do you do it with a fraction the letter is on the top

[@lifewithace2780]

So if it isn't negative you don't switch the < to >????

[@HectorAndresMayoral]

What happens if I multiply in both sides by a negatibe number, does that reverse the inequality statement, or is it only with dividing negative numbers?

[@AvneetB]

Oh god, I love this man. Oh man, only reason I understand math.

[@Anni33100]

my new best friend considering i have finals next week and paid no attention in math at all

[@mangoallie]

Mid Term Test I WASN'T HERE WHEN THE TEACHER TOUGHT THIS LESSON!!!

[@AnhVlogg]

why multiplying or dividing both sides of an inequality by a negative number, the direction of the inequality sign must be switched ????

[@Erika-sq5gb]

I like how he talks nice and slow some teachers talk so fast -___- its like 'can you repeat that again?'

[@beastboy5001]

wat if ur in the six grade like me and i have a+7

[@dareordream3502]

DUDE! u help me a lot!!! I cant belive I was missing that one thing where u change the sign even doe ur voice a lil low doe at least he has a man voice unlike other mens who have a high voice 0_0 been there. Done That.

[@fatimafettahi5683]

You just saved my life I have a test tomorrow thank you

[@illicithoughts]

Omg LOL My question on my HW is 3x > 12 and the first question is -3x < 12 I'm like OMG HAHAH LMAOOOO XD

[@domsmaureen]

Am refreshed,was stuck at the middle of a problem.thanks

[@TheFigure]

I suppose 'sign' isn't the right word. Why do we flip the 'inequality symbol' when multiplying or dividing by a negative number?

[@marblefan500]

Thanks. This actually helped!

[@FILMZ1994]

This guy here is my new teacher.

[@michel5135]

how would i do -a > -100 please can you show or tell me how to do this?

[@syntaxerror4683]

That Monotone voice tho

[@surveycorpsmember2234]

this is one of the hardest topics in math but now it's easy

[@bsvv252]

What if it is a less than or greater than sign

[@monkeyglue3]

Wow, Thank you for this simple explanation.

[@RetroGamingClashOfClans]

thanks man I was finding that kind of math fro a long time,,,finally I found it

[@Brandonsk33n]

Thanks, my teacher should watch these...

[@NintendoFreeakk]

@TheMagicalPuffBunny Yup it's just a small unit of pre-algebra. I remember doing that in elementary too. Later, you'll see it again, but you'll do more difficult problems.

[@r4ymondalex]

So useful, thank you!

[@cosmogang]

@luvbeingmama83 -3x should readily be considered as -3 times x. When you divide positive 12 by negative 3 you get a negative value, -4.

[@CampinCambo]

Im from northern ireland and my math teacher told us to do them a different way from this... but i have to say that this way is much easier:-) GCSE's here i come

[@sushimushi1231]

you taught me a lesson in 2:52 that took my teacher 2 weeks.

[@b._.7295]

Okay but what about just subtraction? My equation is t - 12 ≥ 16 and I need to turn it into an interval notation

[@pinox2243]

if only he had morgan freemans voice

[@xy274]

simple teaching = alot of learning :) this will help me remember

[@KatiieOh9]

@aceboii171 you don't do inverse operations for dividing on the sides. You only us inverse operations if it's a constant by intselt with NO X.

[@LEGANCYGAMING]

thanks !!! really helps

[@Hardcoremaker14]

this is better than going to school :)

[@juiletlovesu]

Well how do u do it with numbers

[@monbub]

It's 12:34 am and I'm fixing my math project because my partner messed up on it. I didn't know how to solve inequalities, so I was panicking, but this video saved me. Thanks lol. My partner is stupid.

[@Cloudwolf29]

how do you solve 2xsquared +3x=9?

[@caielesr]

@tazieya i think, accounting, architecture, college prof., engineering etc. would

[@Cat-vx9ok]

I dont get this problem x>1.

[@abakarhisseine9698]

I am doing business administration in Essex county college,l am going to finance in Montclair state university next semester, but l am not good in math.how can l be good? Help please

[@foxmaster1123]

i dont know how to solve my math 2(3x - 5) > 2x + 6 ??? i went over what i thought to do BUT IT ISNT THE RIGHT ANSWER please help

[@AspiePilo82]

found my new math teacher ; )

[@olliebugANDallebana]

OHMYGOSH YOU SWITCH THE SIGN!!! That explains a lot

[@lauraortiz2649]

i wish i'd have this teacher

[@CorruptCatalystVids1]

This dude is making me understand algebra and i know this is sad but i am taking algebra 1 and geometry at the same time but its good though i am learning a little faster then before and i am a Junior in high school

[@kitty63ful]

hes the best i WISH HE WAS MY algebra teacher ...sucks that I have to have the most boring teachers ever !!!

[@jalenbanks4596]

what about with 3 digits

[@moazzamkhan3957]

I almost slept during this video but thanx any way this helps

[@atlive1]

great job...

[@somnyac]

What if it was -18 > G5

[@princessdisha101]

Thanx so so much, it really helped!

[@pops362]

this is usefull for home work that you didnt pay attention in class for

[@muathk100]

yo, seriously? I perfectly understand this guy. hand's down.

[@TTDaBadAz]

Thank you.

[@jeremycapella7048]

😱😱😱 doing my math homework and one of the problems was -3g

[@AmberLive10]

This helped me so much my teacher can't teach at all

[@phatboi6647]

Thank you so much!!! and god bless you bro now i get it

[@WozniakAttack21]

@OwnedByTechno Well where I live (Illinois) It starts in 7th grade,

[@Itsjoolsx]

Thank you

[@sophiepegasus]

bc you are dividing negative numbers, it involves multypling too

[@arkham720]

Thanks!

[@TheTaleOfRandom]

My test is in two days!

[@delben5975]

Thanks so much

[@lyingmongoose]

He winked near the end. I winked back, in case in was some sort of secret message.

[@joshtaylor381]

Subscribed.

[@proshark000]

I LOVE MATH

[@thatgirln0ryx3]

he explains it waaay better than my algebra 1 teacher. but, my question is.. when are we gonna use this in life? ._.

[@joshday1997]

Does anyone know how to solve this? a+8-2(a-12)-0 If anyone could help me, I would very much appreciate it.

[@FlashWhiteSnoW]

thank you I finally get it

[@rymndry]

lol u read my mind! i have integrated algebra regents tommorow.

[@beelovely421]

if 6.5≤y≤9.5 and y= ?? , find the smallest value of it

[@ShibaScience]

thanks

[@ajajabbi4893]

That's was helpful!

[@Imfphas20]

@Zachylolz Agreed