SOLUTION: solve 3/w=7/w-1/5

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Question 421134: solve
3/w=7/w-1/5
Answer by mananth(16946) About Me  (Show Source):
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3%2Fw=7%2Fw-1%2F5
add -7/w
3%2Fw-7%2Fw=-1%2F5
%283-7%29%2Fw=-1%2F5
-4%2Fw=-1%2F5
cross multiply
-w=-20
/-1
w=20