Question

Which expression has a simplified expression of 5x - 12?

A. 3(4x - 4) - 7x

B. -3(4x - 4) - 7x

C. 3(-4x + 4) - 7x

D. -3(-4x - 4) - 7x

Answer 1

Answer: Simplified version of the answer above: The correct answer is A.

Explanation:

Answer 2

A. 3(4x - 4) - 7x = 12x - 12 - 7x = 5x - 12 yes

B. -3(4x - 4) - 7x = -12x + 12 - 7x = -19x + 12 no

C. 3(-4x + 4) - 7x = -12x + 12 - 7x = -19x + 12 no

D. -3(-4x - 4) - 7x = 12x + 12 - 7x = 5x + 12 no

Answer is A.