Question

3) solve the equation x+2y-4=0
, 2x + 3y -7=0 by substitution
method.​

Answer 1

Answer:

Hello Mate♥️♥️♥️

x+2y-4=0

=> x+2y=4 --------1

2x + 3y -7=0

=>2x+3y=7 ---------2

Solution:-

Value of x from equation 1

=> x=4-2y --------3

#Put the value of x in equation 2

=>2(4-2y)+3y=7

=>8-4y+3y=7

=>4y+3y=7-8

=>-y=-1

#Put the the value of y in equation 3

=>x=4-2(1)

=>4-2

=>2

Hence,x=2,y=1

$thanku$

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Answer 2

$\huge{\underline{\underline{\red{Answer}}}}$

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$\mathbb{\boxed{\pink{GIVEN\: EQUATIONS-}}}$

• x+2y-4=0
• 2x+3y-7=0

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$\underline{\boxed{\pink{Knowledge\:Cell}}}$

What is substitution method?

》 It's a method of solving equation in some variable which the whole equation is expressed in one variables by finding the relation of one variable with other.

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$\bf{\underline{\underline{\red{SOLUTION}}}}$

x+2y-4=0

or, x+2y=4

$\implies{\bold{\boxed{\blue{x=4-2y----i}}}}$

2x+3y-7=0

or, 2(4-2y)+3y-7=0

or, 8-4y+3y-7=0

or, 1-y=0

thus,

$\implies{\large{\boxed{\green{y=1}}}}$

putting value of y in i,

x=4-2y

or, x=4-2×1

or, x=4-2

$\implies{\large{\boxed{\green{x=2}}}}$

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$\large{\underline{\underline{\red{Answer\:is\:x=2\:and\:y=1}}}}$