Answer:
The answer is 6b
Step-by-step explanation:
1) Regroup terms.
[tex]3(a + 2b) - 3a[/tex]
2) Expand by distributing terms.
[tex]3a + 6b - 3a[/tex]
3) Collect like terms .
[tex](3a + 3a) + 6b[/tex]
4) Simplify.
[tex]6b[/tex]
Therefor, the answer is 6b.
