Question

3. If x=5 is a solution of equation 3x- 4y=7 then the value of 'y' is​

Answer 1

Solution:-

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• First Replace 5 in the place of x,

$3(5) - 4y = 7$

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Then; Solve the equation,

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$3x - 4y = 7 \\ \\ \\ \\ 3(5) - 4y = 7 \\ \\ \\ \\ 15 - 4y = 7 \\ \\ \\ \\4y = 7 - 15 \\ \\ \\ \\ 4y = 8 \\ \\ \\ \\ y = \frac{8}{4} \\ \\ \\ \\ \boxed{ y = 2}$

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Hence, The value of y = 2.

Answer 2

Answer:

Given equation is 3x+4y=7

If x=1 put in equation we get

(i)3×1+4y=7

⇒3+4y=7

⇒4y=7−3

⇒4y=4

⇒y=1

(1,1)

If x=2 put in equation we get