Question

Which is a simplified form of the expression 3a + 7 – a – 7?

A. 2a
B. 4a
C. 2a + 14
D. 4a – 14

Answer 1

A) 2a

Explanation:

3a+7-a-7

3a-a+7-7

2a+7-7

2a

Answer 2

Choice A.

Explanation:

3a + 7 - a - 7 = 3a+7 - a+7 = 3a-a = 2a