Formula for the Volume of rectangular prism:
They ask you solve the expresion for w, that means that you have to find a expression like w=?
To do that, you should be move l and w to the other side of equation...
Start moving l,
Tell me, what is doing l to w.. what math operation...
??
Exactly, multiply.. the pass to other side to do the oposite operation.. in this case divide..like this..
we do the same with h.. and thats all.. then we take:
or the same
That's your answer