 
<translate> 17m - n = p Tinye n n'akụkụ abụọ: 17m = n + p Tinye m n'akụkụ abụọ: 18m = n + p + m Ugbu a, kewaa akụkụ abụọ site na 3 6m = (n + p + m)/3 = nkezi nke n, p, na m Azịza ya bụ (C). <eng> 17m - n = p
Add n to both sides:
17m = n + p
Add m to both sides:
18m = n + p + m
Now, divide both sides by 3
6m = (n + p + m)/3 = the average of n, p, and m
So, the answer is (C). 