SOLUTION: [(3a+4)+(5a-4)]-[(2a-6)-(7a+9)]

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Question 636177: [(3a+4)+(5a-4)]-[(2a-6)-(7a+9)]
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
[(3a+4)+(5a-4)]-[(2a-6)-(7a+9)]
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= [8a] - [-5a-15]
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= 8a+5a+15
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= 13a + 15
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Cheers,
Stan H.
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