What is the solution to the system of equation

-7x-2y=-13

X-2y=11

Using substitution

-7x - 2y = - 13

-7x + 7x - 2y = 7x - 13

-2y = 7x - 13

-2 - 2

y = - 3.5x + 6.5

x - 2y = 11

x - 2 (-3.5x + 6.5) = 11

x - 2 (-3.5x) - 2 (6.5) = 11

x + 7x - 13 = 11

8x - 13 = 11

+ 13 + 13

8x = 24

8 8

x = 3

y = - 3.5x + 6.5

y = - 3.5 (3) + 6.5

y = - 10.5 + 6.5

y = - 4

(x, y) = (3, - 4)