Solve for P
P=\frac{391}{45R}
R\neq 0
Solve for R
R=\frac{391}{45P}
P\neq 0
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\frac{PR}{3.91}=\frac{100}{45}
Expand \frac{10}{4.5} by multiplying both numerator and the denominator by 10.
\frac{PR}{3.91}=\frac{20}{9}
Reduce the fraction \frac{100}{45} to lowest terms by extracting and canceling out 5.
PR=\frac{20}{9}\times 3.91
Multiply both sides by 3.91.
PR=\frac{391}{45}
Multiply \frac{20}{9} and 3.91 to get \frac{391}{45}.
RP=\frac{391}{45}
The equation is in standard form.
\frac{RP}{R}=\frac{\frac{391}{45}}{R}
Divide both sides by R.
P=\frac{\frac{391}{45}}{R}
Dividing by R undoes the multiplication by R.
P=\frac{391}{45R}
Divide \frac{391}{45} by R.
\frac{PR}{3.91}=\frac{100}{45}
Expand \frac{10}{4.5} by multiplying both numerator and the denominator by 10.
\frac{PR}{3.91}=\frac{20}{9}
Reduce the fraction \frac{100}{45} to lowest terms by extracting and canceling out 5.
PR=\frac{20}{9}\times 3.91
Multiply both sides by 3.91.
PR=\frac{391}{45}
Multiply \frac{20}{9} and 3.91 to get \frac{391}{45}.
\frac{PR}{P}=\frac{\frac{391}{45}}{P}
Divide both sides by P.
R=\frac{\frac{391}{45}}{P}
Dividing by P undoes the multiplication by P.
R=\frac{391}{45P}
Divide \frac{391}{45} by P.
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