Question

Select all expressions that are equivalent to 6 + 12x.

A. 3(2 + 4x)

B. 3(2 + 6x) + 6x

C. 5(1 + 2x) + 1 + 2x

D. 7(1 + 2x) – 2x – 1

E. 7(1 + 2x) + 10x – 1

Answer 1

A, C, D

Explanation:

A: 3×2=6

3×4x=12x

C: 5×1=5+1=6

5×2x=10x+2x=12x

D: 7×1=7-1=6

7×2x=14x-2x=12x

Answer 2

E. 7(1 + 2x) + 10x – 1