Answer:
s=5
Step-by-step explanation:
The third equation implies that q=36.
Substitute for q in the second equation to get
36/p=4
Now solve for p
p/36=1/4
p=36/4=9
Solve the first equation for s.
s/(p+q)=1/9
s=(p+q)/9
Now substitute for q and p in this equation.
s=(9+36)/9=45/9=5
