Answer :

eah
[tex] \frac{n+m}{p}=q \\ \\ n+m=pq \\ \\ \boxed{n=pq-m }[/tex]
N+m/p=q
Multiply by p
Np+m=pq
Subtract m
Np=pq-m
Divide by p
N=(pq-m)/p

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