How would I solve the equations: y = x-4 and y=x^2-4x using substitution

x = 6

Explanation:

y = x - 4

26 = 4x + y

If y = y, then we can rewrite this system as this: 4x + x - 4 = 26

Then we combine like terms and add 4 on both sides to give us 5 x = 30. Divide by 5 on both sides and we arrive at the solution: x = 6