Respuesta :

(3,-2)
Explanation
3x+5y=-1
7x-5y=31
Get rid of y
3x=-1
7x=30
10x=30
X=3
Plug x into one equation

7(3)-5y=31
21-5y=31
-21. -21
-5y=10
Y=-2

(3,-2)
X, Y
This is the solution for the system of equations