Substitution Extravaganza

Match it! Select the correct answer from the pull down...Good luck!

x = y + 10 and -4y - 5 = x

-2x + y = 10 and x = y - 7

x = 1/2 y - 3 and 5x - 5y = 0

x + y = 0 and y = 2/5 x + 7

y = -3x - 13 and -4y - x = -3

y = -1/4 x - 1 and 2x = y + 8

1/3 y + 1 = x and 2x + y = -3

-x + 2y = 5 and 4x + 6y = -6