Question 68306
{{{P=(QV)/(HE) }}}

Since Q is in the numerator
Step 1 would be eliminating the denominator, multiply both sides with HE
{{{(HE)P=((QV)/(HE))(HE))}}} HE on the left side of the equal sign will be cancelled then 
{{{PHE=(QV)}}} --> so that Q will be left, we must eliminate V by dividing both sides by V
 
{{{(PHE)/V=(QV)/V}}} V on the left side of the equation will be cancelled 


The Result will be 
{{{(PHE)/V=Q}}}