Question

how do you solve this?

Answer 1

-7x -7y = 21
Y = 6

Since they are giving you the value of 6 you just plug it in the equation

-7x - 7(6) = 21
-7x - 42 = 21
+ 42. +42

-7x = 63
/-7. /-7

X = -9

Answer 2

-7x-7y=21
Y=6
-7x-7×6=21