what i need answered

Question

 4x - y = 20 and -4x - 4y = 20. Write your answer as a coordinate point

Answer 1

Adds the equations together:

-5y = 40

y = -8

4x - -8 = 20 ---> 4x + 8 = 20 --> 4x = 12 ---> x = 3

-4x - 4(-8) = 20 ---> -4x + 32 = 20 --> -4x = -12 ---> x = 3

the solution is (3,-8)