Answer:
(4,4)
Step-by-step explanation:
1) Using substitution: move 7y to the other side by subtraction
x = 32 - 7y
2) substitute in for x in the first equation
-2(32 - 7y) + 7y = 20
3) distribute
-64 + 14y + 7y = 20
4) add like terms and solve for y
21y = 84
y = 4
5) plug in y value of for in one of the eqautions to get x value
-2x + 7(4) = 20
x = 4
