Question

-3x+7y=5x+2y find the missing value to this (-5, )

Answer 1

Answer:

put x=-5 to get the corresponding value of y

$-3(-5)+7y=5(-5)+2y \\ 5y=--40 \\ \implies y=-8$

so that point is (-5,-8)

Answer 2

- 3x + 7y = 5x + 2y

- 3(-5) + 7y = 5(-5) + 2y

15 + 7y = - 25 + 2y

7y - 2y = - 25 - 15

5y = - 40

y = - 40 : 5

y = - 8