Question

The model represents an equation.

-1
x
IN
Х
What value of x makes the equation true? O
A. -1
B. 3
D. 7
C. -7

Answer 1

x = - 7 (C)

Explanation:

=> x + x + 1 + 1 + 1 = x - 1 - 1 - 1 - 1

=> 2x + 3 = x - 4

=> 2x - x = - 4 - 3

• x = - 7 ✔

Answer 2

Explanation:

2x + 3 = x- 4

2x-x = -4-3

x = -7