SOLUTION: if f(x)=5-3x divide by 2 and f-1(x)=5-2x divide by 3 show that f(f-1(x))=x

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Question 1117496: if f(x)=5-3x divide by 2 and f-1(x)=5-2x divide by 3 show that f(f-1(x))=x
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