SOLUTION: Solve the proportion 3(a-4)/5=2a/6

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Question 240379: Solve the proportion
3(a-4)/5=2a/6
Answer by Alan3354(69443) About Me  (Show Source):
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3(a-4)/5=2a/6
Cross multiply
6*3(a-4) = 10a
18a - 72 = 10a
-8a = -72
a = 9