Solve for x
x=12
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\frac{1}{3}x-4=0
Swap sides so that all variable terms are on the left hand side.
\frac{1}{3}x=4
Add 4 to both sides. Anything plus zero gives itself.
x=4\times 3
Multiply both sides by 3, the reciprocal of \frac{1}{3}.
x=12
Multiply 4 and 3 to get 12.
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