Tuesday
September 30, 2014

Homework Help: Algebra

Posted by Sam on Tuesday, July 6, 2010 at 11:53pm.

Hi, here is a question and my answer I have done so far, not sure about the end result so any help appreciated

5a-2 (5+4a)=-9
Multiply out brackets 5a-10+8a =-9
Add 10, 5a+8a=1
Collect like terms 13a = -9
Divide by 13 = a =1/13
I am pretty sure the answer should be a = -1/3 but not sure how to get there, , thanks

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