Solve for X
X=400
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\frac{2}{5}X=140+20
Add 20 to both sides.
\frac{2}{5}X=160
Add 140 and 20 to get 160.
X=160\times \frac{5}{2}
Multiply both sides by \frac{5}{2}, the reciprocal of \frac{2}{5}.
X=\frac{160\times 5}{2}
Express 160\times \frac{5}{2} as a single fraction.
X=\frac{800}{2}
Multiply 160 and 5 to get 800.
X=400
Divide 800 by 2 to get 400.
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