Question

What is the solution to the system x-y=-5 and 7x+3y=-75

Answer 1

x=-6

y=-11

Explanation:

x-y=-5

7x+3y=-75

x=5+y plug that in to the second equation

7(5+y)+3y=-75

35+7y+3y=-75

10y=-75-35

10y=-110

y=-11

plug y into first equation

x+11=5

x=5-11

x=-6