Linear Equations in Two Variables

[@ManochaAcademy]

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ANS#1: 2x + y =7 (i) 4x - 3y + 1 = 0 (ii) (i)2x = 7 - y substituting 2x in equa..(ii) we make 4x as 2(2x) in equation (ii) 2(2x) - 3y + 1= 0 2(7 - y) - 3y + 1 = 0 14 - 2y -3y = -1 -5y = -15 y = -15\-5 y = 3 substituting value of "y" in equation (i) (i) 2x + y = 7 2x + 3 =7 2x = 7 - 3 2x = 4 x = 4\2 x = 2 SOLUTIION SET ( 2 , 3 )

[@Brian-hq7ko]

Q1 x=2 & y=3 Q2 x=5 & y=0 vertices are: 20,12 5,0 15,6 A=4.32cm2 Q3 78

[@ManochaAcademy]

Very good! Q1 and Q3 answers are correct! Q2, one of the vertex (5, 0) is correct. Other two vertices are not right. You can plot it on the graph and see where these lines are intersecting the y-axis. These will give you the other 2 points. Let me know what answer you get or if there are any doubts!

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[@ManochaAcademy]

Excellent

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[@ManochaAcademy]

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[@ManochaAcademy]

All The best

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Legends all the best for tomorrow's pepar 👍

[@ambikasivakumar338]

3:31 we can also do it in this method x+y=10 (1) x -y= 2 (2) Adding eq(1)&(2) x + y=10 x - y=2 2x = 12 x = 6 Subtituting value of x in eq (1) 6+y =10 y = 10-6 y = 4 Solution (6,4)

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Sir I know the answer of your third question by the help of Hit & trial method that 78 is the given number but I also want to solve this question by Substitute method but I can not solve this by substitute method Please help me to solve this question by substitute method🙏🙏🙏🙏🙏

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Thank you so much sir due to your explanation I scored 1st on maths

[@ManochaAcademy]

Congratulations

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8

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1. x=2 and y=3 3. 78 Thank you sir for explaining it nicely.😊

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What are the solutions of 1,2,3 question's

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[@ManochaAcademy]

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Keep watching

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Sir Ans of questions no. 1) is x = 2 ,y = 3

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how???

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[@ManochaAcademy]

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[@ManochaAcademy]

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[@siddharthmishra3186]

Ans 1 -> x=2 , y=3 Ans 2 -> solution is (5,0) Ans 2 -> 87 sir you are awesom ✔✔

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no x=0 , y=2

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All the best

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[@vishnusai3918]

SIR, PLEASE ANSWER THIS DOUBT. We have the standard form of a linear equation as: ax+b=0 But these are also linear equations: 1. 25x+25=100 (Here the RHS is 100, but the standard form states a linear equation has 0 as RHS.) 2. 25x-25=100 (Here the minus or subtraction(-) sign has been used, but the standard form states that we use the plus or addition sign(+).) SPECIFY SUITABLE PERFECT REASONS FOR THIS.

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1)We should convert them into standard form

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[@ManochaAcademy]

Glad it was helpful!

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Question 1 x=2, y=3 Question 2 x=5, y=0 Can I have a reply on my answer 🤔

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I got first Qno y 4 and x 4 second Qno Y 10 x 0 ? please guide me

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[@ManochaAcademy]

Thank you :) I tried to answer your doubt in the comment below. Let me know if it is clear now. Or if you have any further question?

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Thank you so much sir the only best video on linear equation. Thank you a lot.

[@ManochaAcademy]

You are most welcome

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Yeah coz it's in English

[@bhushanbhushan4253]

1) x=2, y=3 2) x=5, y=0 3)87

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Thanks & 1) question please send answers

[@ManochaAcademy]

Here are the answers of the 3 questions. Let me know if you have any doubts! Q1) x=2 & y=3 Q2) Vertices are (5, 0), (0, 3) and (0, -4) Area of triangle = 17.5 Q3) Number is 78

[@piridimahesh9415]

Easy to understand

[@ManochaAcademy]

Thank you :)

[@jananithiyagarajan7957]

1. Ans x=2, Y=3 One doubt in 2 questions the ans are in fraction so what can I do

[@codewithnaman485]

why can't we do 2x+2 = 10

[@killerduozooba5929]

It's 1 variable it's not 2 variables

[@killerduozooba5929]

And also 2x+2=10 x is one variable And also 2x+2x =10 x is 2 variables According to it in 1)x has only once its variable According to 2)x has twice so it's to variables... Remember not only x. Other alphabets like p, a, b, x are variables

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I appreciate you , Sir

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Thank you :)

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Sir but don't know how to form an equations in word problems sir

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All the best

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hit and trial method is there in science how did it come to maths ????

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Its just like trial and error method..

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Most welcome 😊

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Thanks a ton

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Trick to make LHS = RHS : Just multiply both sides by "0" 😁😁

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[@ManochaAcademy]

It's my pleasure

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Y=3 and x=2 Question.1 Answer

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👍

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[@ManochaAcademy]

Glad to hear that

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[@ManochaAcademy]

Thanks for liking

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[@ManochaAcademy]

Glad to hear it helped. Keep watching and do share with your friends.

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Very helpful sir! I had a tough time finding an explanatory video in english, since all of them were in hindi...Kudos to you for speaking in English so that all of us could understand...the concept clarity is just soo precise, thank you!