Using substitution in the given system of equations, 2x - y = 4 and y = -2x + 8, yields x = 3 as the solution, consistent with the values that satisfy both equations.
To find the value of x, substitute the expression for y from the second equation into the first equation:
2x - y = 4
Substitute -2x + 8 for y:
2x - (-2x + 8) = 4
Combine like terms:
2x + 2x - 8 = 4
Combine 2x terms:
4x - 8 = 4
Add 8 to both sides:
4x = 12
Divide by 4:
x = 3
Therefore, the correct value of x is x = 3.