Question

Use the model to solve for x. A) x = 1 B) x = 3 C) x = 5 D) x =

Answer 1

D){?} x = 7

Explanation:

x + 3•(+1) = 2•x + 4•(-1)

x + 3 = 2x - 4

-3 -3

x = 2x - 7

-2x -2x

- x = -7

÷(-1) ÷(-1)

x = 7