Solve for u
u=-2.3
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-38u+79-5u=177.9
Subtract 5u from both sides.
-43u+79=177.9
Combine -38u and -5u to get -43u.
-43u=177.9-79
Subtract 79 from both sides.
-43u=98.9
Subtract 79 from 177.9 to get 98.9.
u=\frac{98.9}{-43}
Divide both sides by -43.
u=\frac{989}{-430}
Expand \frac{98.9}{-43} by multiplying both numerator and the denominator by 10.
u=-\frac{23}{10}
Reduce the fraction \frac{989}{-430} to lowest terms by extracting and canceling out 43.
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