Question

Check whether (– 1, 5) is a solution of each system of equations.
2x=y-7
2y=-x+9

Answer 1

x=-1 y=5
Plug in your values:
2(-1)=5-7
Does -2= -2? Yes. Solution.
2(5)=(1)+9 {Because x is already negative, I made it positive in the problem.}
Does 10=10? Yes. Solution.