When ever you're presented with a problem that asks "What number divided by a number, equals a number?" You can answer it by multiplying the numbers you know.
Thus: 13 x 72 = 936. So your answer is: 936 divided by 13 equals 72.
2,535 / 195 = 13
No, it equals .017077 4216 divided by 72 equals 58.55
X = 72 72 divided by 9 equals 8
72
1 divided by 13 equals 13
5
1
1
5.5385
72
2
-3