Multiplying and dividing with inequalities | Linear inequalities | Algebra I | Khan Academy

Courses on Khan Academy are always 100% free. Start practicing-and saving your progress-now: www.khanacademy.org/math/cc-seventh-grade-math/cc-7th-variables-expressions/cc-7th-inequalities/v/inequalities-using-multiplication-and-division
Our discussion of linear inequalities begins with multiplying and dividing by negative numbers. Listen closely for the word "swap." Super important!
Practice this lesson yourself on KhanAcademy.org right now:
www.khanacademy.org/math/algebra/linear_inequalities/inequalities/e/one_step_inequalities?YT&Desc&AlgebraI
Watch the next lesson: www.khanacademy.org/math/algebra/linear_inequalities/inequalities/v/one-step-inequalities-2?YT&Desc&AlgebraI
Missed the previous lesson?
www.khanacademy.org/math/algebra/solving-linear-equations-and-inequalities/old-school-equations/v/age-word-problems-3?YT&Desc&AlgebraI
Algebra I on Khan Academy: Algebra is the language through which we describe patterns. Think of it as a shorthand, of sorts. As opposed to having to do something over and over again, algebra gives you a simple way to express that repetitive process. It's also seen as a "gatekeeper" subject. Once you achieve an understanding of algebra, the higher-level math subjects become accessible to you. Without it, it's impossible to move forward. It's used by people with lots of different jobs, like carpentry, engineering, and fashion design. In these tutorials, we'll cover a lot of ground. Some of the topics include linear equations, linear inequalities, linear functions, systems of equations, factoring expressions, quadratic expressions, exponents, functions, and ratios.
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[@bobnoman273]

You are the best you make everything easier to understand I have an awesome math teacher but you actually make me understand ps my teacher shows your videos in class and tells us to watch other ones at home

[@niyah4604]

How do you know weather to divide or multiply the equation??

[@JorgeOrozco12]

This is an awesome vid, it teaches way better than all my math teachers combined. This is awesome!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

[@Kateisnotok]

Nice. Thanks for this, I'm homeschooled on Easy Peasy and so my mom is busy with her stuff and this helps me a lot with my 7th grade math.

[@CinDeclerck]

You're In easy peasy to??? So am I!!! 😮😮😮

[@caityfairbx]

Thanks! I’m in quarantine so I don’t have contact with my teacher. Your videos help clear everything up! Thank you so much for helping students during their time of need! ❤️

[@CristiansProduction]

Guys you dont have to add the 2 in at 2:00. You can just divide to get the same answer. Why is this guy making things more complicated?!!

[@teehee5700]

Ikr. My teacher give us this on khan academy and this guy makes it so frustrating and more complicated then it needs to be

[@Talall]

Dude How did -0.5 become -2 ?? Dafuq

[@awarrior1237]

You can just divide by -0.5 instead (it was also confusing at first then I figured it out)

[@freemind1618]

@@awarrior1237 Yes

[@freemind1618]

You want to leave X alone So -2x0.5=1 So X or 1x is the same

[@diyworld7208]

If you think about it dividing by .5 and 2 are the same

[@dhaimathomas3332]

@@diyworld7208 I still don’t get it-

[@user-pb1gj7hi9h]

I didn't really understand it well but it is still helpful💓THANKS- I got confused when I tried to solve it😅

[@musicandvlogschannel8428]

I’m i the only one in 2020?

[@madyngo1137]

nope im here lol 2020 squad

[@captainminer-tx3yl]

n0pE

[@samanthamccallister2000]

nope

[@musicandvlogschannel8428]

Hello my fellow people who were failing and sent here by their teachers

[@issaihjankz8819]

I I'm here

[@gabmonjr533]

I got one hundred in my exam thanks you

[@freemind1618]

Hope you get 100 with all ur exam

[@hemthakur805]

Really helpful..thanks 😌

[@alainatang3674]

Thank u it really helped me on my homework

[@traininginmathematics3905]

"what is a n open or closed circle" >> Closed circle represent that the point is included in the interval and open circle represent the concerned point is not included in the interval. For example the interval [1,2) will be represented by a closed circle at 1 and an open circle at 2. " How did -0.5 become -2 ??" >> No, we want to cancel -0.5 by multiplying it by a number, let us call it x. Cancelling means, we want something like x instead -0.5x, and x or 1*x are the same. So, x*(-0.5)=1 or x=1/(-0.5)=-10/5=-2.

[@salehabdulaziz4264]

how do we know whether to multiply or divide?

[@Giganigcuhbyte]

This guy can answer all the parts of my exams for real he help me with this vid

[@mr.spaceboy9785]

wasn't an English exam I assume?

[@moh505789]

very helpful video ^^ شكرأ

[@spectic777stream7]

شكرا هلا

[@cringedelusionist]

Watching this while in 6th grade and don’t understand any of the fractions-

[@LuvDiorxXx]

Same 😔

[@oushaalrumaithy2275]

Lmao its fine,im older than yall by a year and i still do not know its fine lol

[@spectic777stream7]

Can you make a live stream because I want to ask you many questions

[@Pineapplex1990x]

urgh i never got this at school but I FINALLLLLY GET IT THANK U SO MUCH :D

[@norwayte]

Another good one.

[@DRLBX-gx3yn]

thank u

[@unnatikapadia7915]

thank you khan academy this helped me a lot

[@sofiaa3274]

0:33 and i’m already confused...

[@cupidllover2186]

-0.5 is -1/2 so that's why he multiply with -2. Do you get it?

[@Giganigcuhbyte]

It's easy you don't get it?

[@teehee5700]

@@Giganigcuhbyte some people can’t do math as well as you bro

[@cupidllover2186]

thank you sir

[@kouamv304]

I don’t get it

[@angelinat.394]

How do you know where to insert the solution into the x and y set? In other words, why did you put the solution on the Y side and infinity on the X side but switched in later problems?

[@sharmoota-3bdy]

it's no problem I suppose we aren't doing linear graphs or something.

[@jolinamarie10]

Here on hour before my exam because I had piles of homework and couldn't finish it all

[@teehee5700]

Same

[@michellechen3327]

At 5:03 it has "real number" in the set notation as capitalized; is it supposed to be like that?

[@SuperFreshCookies]

thank you very easy to follow except i dont understand how you got 10/3

[@margaritathibodeaux4738]

How did you get infinty?

[@stayysid]

Your voice is majestic 😍

[@mr.spaceboy9785]

ඞඞඞඞඞඞඞඞඞඞඞඞඞඞඞඞඞඞඞඞඞඞඞඞඞඞඞඞඞඞඞඞඞඞඞඞඞඞඞඞඞඞඞඞඞඞඞඞඞඞඞඞඞඞඞඞඞඞඞඞඞඞඞඞඞඞඞඞඞඞඞඞඞඞඞඞඞඞඞඞඞඞඞඞඞඞඞඞඞඞඞඞඞඞඞඞඞඞsus

[@stayysid]

@@mr.spaceboy9785 lmfaoooo

[@bloodrushedintomycheeks]

@@mr.spaceboy9785 amogus

[@frankveer161]

It’s lie as asmr

[@frankveer161]

like

[@tylerc4686]

thank you

[@KoopaClanCartoons]

Do you know how to solve an inequality that is 12 greater than or equal to 6s?

[@omarhatem9575]

(you probably don't need to get the answer to this after 3 years, but here goes) Okay. Let us do this one step at a time. 12≥6s. We want to isolate the s in one side. We do this by dividing both sides by 6 (the coefficient of s). 12÷6≥6s÷6 Since we are dividing by a positive number we do not flip the greater than or equal sign. All there is left to do is simplify. 2≥s which is equivalent to s≤2 (our solution)

[@applebaby1968]

Everyone here's like " oh you helped me so much" NOT ME IVE BEEN LOOKIBG FOR HELP FOR 2 HOURS STILL HAVENT FOUND ANYTHING😭😭😭😭😭😭😫😫😫😫😫

[@fredyjoshua8698]

thank so much

[@bradq]

this new rating system sucks big time. The net is getting too picky about things. I hope some one with a free mind comes up with something new

[@freemind1618]

Free mind is here

[@SequinBrain]

the swap is something I keep forgetting for some reason

[@anime_simp9082]

2010

[@MrRyanhp]

THANK YOU SO MUCH!

[@saidmahmudmahkamjonov2528]

Very helpful

[@professionalsamuraiforhire2451]

2010?

[@the1dude707]

how did you get -2

[@brandxnplayz9713]

Got a exam tommorow.

[@taphnheasun5006]

But why multiply two

[@rinaward6793]

it is helpful

[@unnatikapadia7915]

i am still a bit confused

[@alysiaofori7331]

try lensoo create for the scrahtpad

[@Osonola]

I Fucking Love You. Thanks.

[@spectic777stream7]

But how you get two

[@akshayappan6526]

Isn't negative infinity definity? If not, what is definity?

[@anitaiacovetto8922]

hi

[@eiadmohamed9421]

POV you are here in 2020

[@hudsonobrien3946]

Nah man 2024

[@zamkove1278]

How do u know if it's an equality or not

[@cherryblossoms4528]

inequality has the < > "less than and equal to" "greater than and equal to" signs whereas an equation has = sign

[@kamaridawn1212]

Why didn't you just get rid of the -0.5 with the variable???

[@akshayappan6526]

what is the program used for scratchpad?

[@art.hropod]

Akshay Appan based on the crosshair, I'm guising it's photoshop

[@BrickBar45]

naww this vid is older than me :skull:

[@jasminedandler9081]

2024

[@hashemfiras3925]

you did not tell us what is a n open or closed circle

[@PACClN]

open is > and < while closed has the line under it

[@devonboy000]

my dad showed meh this nd i thought...''grrr...y is my dad making meh do this mess'' now khan is kinda like tumblr or facebook to meh...i get on when im sad, happy,mad, or need help! LML!!! THANKS SAL!

[@tyu951]

Meh? Man I feel bad for English teachers back in 2012

[@donovanbeats7383]

Hello people of the past, am from the future...

[@mr.spaceboy9785]

hello, person of the past im the future.

[@nnova2X]

ku

[@ieatmoney5074]

garbage content i got scammed and got my answer wrong

[@mikasajeager8517]

I know nothing. I thinks that's a me problem

[@elisaaplin1068]

I failed this unit

[@bezawitwubshet4826]

Hi ppl, like if ur in mrs.brewers class at couch middle

[@bezawitwubshet4826]

@Elizabeth Knickmeyer idk our school is called couch middle, but the high school is named after the town, sooooooooo ye

[@josephrauso5486]

Wait, how is 1 less than 2?😂

[@josephrauso5486]

Im joking guys

[@dorkle9085]

@@josephrauso5486 oh thank god

[@soleilfrager2797]

STRAIGHT UP AWFUL

[@cbjorkm1]

thanks

[@awarrior1237]

Thanks