SOLUTION: (a-7b)/(a+7b)= -3k-8 Solve for a dont have a clue myself :(

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Question 400704: (a-7b)/(a+7b)= -3k-8
Solve for a
dont have a clue myself :(
Answer by sofiyac(983) About Me  (Show Source):
You can put this solution on YOUR website!
cross multiply and you get
a-7b=(a+7b)(-3k-8)
a-7b=-3ak-8a-21bk-56b
a+3ak+8a=7b-21bk-56b
9a+3ak=-49b-21bk
a(9+3k)=-49b-21bk
a=%28-49b-21bk%29%2F%289%2B3k%29