Question

To which expression does 3(a + 2b) - 3a simplify? a. -6a + 6b c. 2b b. 3a + 6b d. 6b

Answer 1

d. 6b

Explanation:

Simplify the following:

`\longrightarrow` 3(a + 2b) - 3a

3(a + 2b) = 3a + 6b:

`\longrightarrow` 3a + 6b - 3a

Grouping like terms,

3a + 6b - 3a = 6b + (3a - 3a):

`\longrightarrow` 6b + (3a - 3a)

3 a - 3 a = 0:

`\longrightarrow` 6b

Answer 2

Expand
3a + 6b - 3a
The 3a and (-3a) cancel out
Leaving you with 6b
The answer: d. 6b