Solve for u
u=-20
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-8\times \frac{5}{2}=u
Multiply both sides by \frac{5}{2}, the reciprocal of \frac{2}{5}.
\frac{-8\times 5}{2}=u
Express -8\times \frac{5}{2} as a single fraction.
\frac{-40}{2}=u
Multiply -8 and 5 to get -40.
-20=u
Divide -40 by 2 to get -20.
u=-20
Swap sides so that all variable terms are on the left hand side.
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