Solve for r
\left\{\begin{matrix}r=\frac{S}{r_{1}w^{4}}\text{, }&r_{1}\neq 0\text{ and }w\neq 0\\r\in \mathrm{R}\text{, }&\left(r_{1}=0\text{ or }w=0\right)\text{ and }S=0\end{matrix}\right.
Solve for S
S=rr_{1}w^{4}
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S=w^{4}rr_{1}
To multiply powers of the same base, add their exponents. Add 2 and 2 to get 4.
w^{4}rr_{1}=S
Swap sides so that all variable terms are on the left hand side.
r_{1}w^{4}r=S
The equation is in standard form.
\frac{r_{1}w^{4}r}{r_{1}w^{4}}=\frac{S}{r_{1}w^{4}}
Divide both sides by w^{4}r_{1}.
r=\frac{S}{r_{1}w^{4}}
Dividing by w^{4}r_{1} undoes the multiplication by w^{4}r_{1}.
S=w^{4}rr_{1}
To multiply powers of the same base, add their exponents. Add 2 and 2 to get 4.
Examples
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Matrix
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Integration
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Limits
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