Besides setting the cross products equal to each other in order to solve the equation $\frac { H } { p } = \frac { W } { \rho + W }$ for P , the distributive property will also be used in the process to isolate P .

Question

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To solve for $P$, after setting the cross products equal ($H(\rho + W) = pW$), the distributive property is used to expand $H(\rho + W)$ into $H\rho + HW$, which is a necessary step before isolating $P$.

Besides Setting the Cross Products Equal to Each Other in Order