Solve for u
u=10
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25\times \frac{2}{5}=u
Multiply both sides by \frac{2}{5}, the reciprocal of \frac{5}{2}.
\frac{25\times 2}{5}=u
Express 25\times \frac{2}{5} as a single fraction.
\frac{50}{5}=u
Multiply 25 and 2 to get 50.
10=u
Divide 50 by 5 to get 10.
u=10
Swap sides so that all variable terms are on the left hand side.
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