SOLUTION: 3(a-7)-3(2a-4)=4(a+3)

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Question 643087: 3(a-7)-3(2a-4)=4(a+3)
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
3%28a-7%29-3%282a-4%29=4%28a%2B3%29 Start with the given equation.


3a-21-6a%2B12=4a%2B12 Distribute.


-3a-9=4a%2B12 Combine like terms on the left side.


-3a=4a%2B12%2B9 Add 9 to both sides.


-3a-4a=12%2B9 Subtract 4a from both sides.


-7a=12%2B9 Combine like terms on the left side.


-7a=21 Combine like terms on the right side.


a=%2821%29%2F%28-7%29 Divide both sides by -7 to isolate a.


a=-3 Reduce.


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Answer:

So the solution is a=-3