Question

2x + 7y = - 10
2x + 2y = 20

Answer 1

Explanation:

for the second one slope is -1 when the y intercept is (0,10)

Answer 2

x=16, y= -6

Explanation:

(2x+2y) - (2x+7y)=20-(-10)

2x+2y-2x-7y=30

-5y= 30

y=30/-5

y= -6

2x+2*-6=20

2x-12=20

2x=20+12

2x=32

x=32/2

x=16