SOLUTION: (a+3)/2+(2a+12)/3=a-2(a+7).Can you show me the working out on how to get a=-9 because i cannot understand the working out given.

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Question 660395: (a+3)/2+(2a+12)/3=a-2(a+7).Can you show me the working out on how to get a=-9 because i cannot understand the working out given.
Answer by ewatrrr(24785)   (Show Source): You can put this solution on YOUR website!

 
Hi,
|Multiplying thru by 6 so as all denominators = 1

3a + 9 + 4a + 24 = 6a - 12a - 84 || Combining Like Terms
33 + 84 = -13a
117 = -13a
-9 = a
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