exam Maths Puzzle Numerical Ability

3/2x-2+1/2=2/x-1

3 over 2x-2, plus one-half, equals 2 over x-1.

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exam Other Question

Amelia chose 3 CDs that each cost $16. The sales tax on the three CDs is $3.96. Write a direct variation equation relating sales tax to the price. Graph the equation you wrote in. Find (f o g)(16) if f(x)=3^x and f(x)=log4(x)

I got this far
g(16)=log4(16)=4

Please help.Thanks