Answer:
q = (r - px) / x
or you could write it as q = (r/x) - p
Step-by-step explanation:
px + qx = r
qx = r - px
q = (r - px) / x
Simplify both sides of equation and then isolate the variable your answer should be
q = [tex]\frac{r}{2x}[/tex]
Hopefully this helps ^0^ Mark Brain