Solve the system of linear equations by eliminating a variable

Question

solve the system of linear equations by eliminating a variable

x-y=-7

3x+y=-5

what ordered pair represents the solution to the system of equations?

Answer 1

x-y = 7, y =x-7

3x+y =-5

3x +x-7 =-5

4x = -5 +7 = 2

4x = 2

x =2/4 = 1/2

x=1/2

y = x-7 = 1/2 -7 = -13/2

y =-13/2