Solve for x
x=84
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x-\frac{1}{2}x=42
Multiply both sides of the equation by 2.
\frac{1}{2}x=42
Combine x and -\frac{1}{2}x to get \frac{1}{2}x.
x=42\times 2
Multiply both sides by 2, the reciprocal of \frac{1}{2}.
x=84
Multiply 42 and 2 to get 84.
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