Respuesta :
Answer:
13a + 6b
Step-by-step explanation:
Given
(a + 3b) + 3(4a + b) ← distribute parenthesis
= a + 3b + 12a + 3b ← collect like terms
= 13a + 6b
Answer: 13a+3b+18
Step-by-step explanation:
First distribute the 3 to 4a+b
Then you get 12a+18
Add 12a+18 with a+3b
