Question

Solve the system by elimination.
3x-10y=-25
4x+40y=20

Answer 1

Divide the 2nd equation by 4

3x - 10y = -25
x + 10y = 5

Adding them together:

4x = -20
x = -5

Substitute into x + 10y = 5
-5 + 10y = 5
10y = 10
y=1

So x=-5, and y=1.

Answer 2

@Malaria thanks