What is the first step in solving the system of equations below? x - y = 2

y = 2x - 4

Question 4 options:

Combine the like terms between the two equations.

Substitute 2x - 4 for the y value in the equation x - y = 2.

In the equation y = 2x - 4, add 4 to both sides to isolate the 2x value.

Rewrite x - y = 2 as x = y - 2.