SOLUTION: hi erm, im kinda stuck about a question on my pratise paper... i have an exam in 2 weeks and have realised i have a problem... 1) expand and simplify 9a+3(8-2a) 2)7y+21

Algebra ->  Real-numbers -> SOLUTION: hi erm, im kinda stuck about a question on my pratise paper... i have an exam in 2 weeks and have realised i have a problem... 1) expand and simplify 9a+3(8-2a) 2)7y+21      Log On


   

Question 671174: hi erm, im kinda stuck about a question on my pratise paper... i have an exam in 2 weeks and have realised i have a problem...
1) expand and simplify 9a+3(8-2a)
2)7y+21
Answer by swincher4391(1107) About Me  (Show Source):
You can put this solution on YOUR website!
9a%2B3%288-2a%29
Distribute
9a+%2B+3%2A8+-+3%2A%28-2a%29
Combine like terms
9a+%2B+24+%2B+6a
Factor out a 3.
15a+%2B+24
3%285a%2B8%29
--------------------
7y%2B21
Factor out a 7.
7%28y%2B3%29