What expression is equivalent to 9(9m + 3t)?

Which of these equations, when solved, gives a different value of x than the other three? a9.1 = -0.2x + 10 b10 = 9.1 + 0.2x c10 – 0.2x = 9.1 d9.1 – 10 = 0.2x

A. 127 cm^2 b. 144.5 cm^2 c. 172 cm^2 d. 50 cm^2

Twelve less than a number is at most 20