Respuesta :

Answer: x = 14

Step-by-step explanation:

  • Start with the equation 2y - x = 0

2y - x = 0

2y = x

y = x/2

  • Now you can sub y into the equation x = y + 7

x = y + 7

x = (x/2) + 7

(x = (x/2) + 7) 2   <- Multiply both sides of the equation by 2

2x = x + 14

-x    -x                 <- subtract x from both sides

x = 14