Solve for d
d=\frac{U}{8}
Solve for U
U=8d
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8d=U
Swap sides so that all variable terms are on the left hand side.
\frac{8d}{8}=\frac{U}{8}
Divide both sides by 8.
d=\frac{U}{8}
Dividing by 8 undoes the multiplication by 8.
Examples
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Matrix
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