Solve for u
u=\frac{5}{8}=0.625
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-3=8\left(u-1\right)
Variable u cannot be equal to 1 since division by zero is not defined. Multiply both sides of the equation by u-1.
-3=8u-8
Use the distributive property to multiply 8 by u-1.
8u-8=-3
Swap sides so that all variable terms are on the left hand side.
8u=-3+8
Add 8 to both sides.
8u=5
Add -3 and 8 to get 5.
u=\frac{5}{8}
Divide both sides by 8.
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