What is the answer for y=2x-5 and 4x-y=7

Substitute the first equation into the second equation. You will get:

4x - (2x - 5) = 7

Distribute the negative sign into the parenthesis:

4x - 2x + 5 = 7

Simplify

2x + 5 = 7

Subtract 5 on both sides

2x = 2

x = 1

Now, substitute x = 1 into the first equation:

y = 2 (1) - 5

y = 2 - 5

y = - 3

The solution to the system of equations is (1, - 3).