Question

What’s the solution?

Answer 1

4x - 4y = -4

- (4x + y = 16)

___________

5y = -20

Now on solving the equation we have:

= 5y = -20

= y = -20/5

= y = -4

If y = -4 then,

= 4x + y = 16

= 4x + (-4) = 16

= 4x = 16 + 4

= x = 20/4

= x = 5

Thus, x = 5, y = -4