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madreJ [45]
3 years ago
15

PLEASE HELP IVE BEEN STUCK ON THIS QUESTION FOR 20 MINS IDK :(

Mathematics
1 answer:
steposvetlana [31]3 years ago
3 0
Remember
\frac{x^m}{x^n}=x^{m-n}
and
if a^b=a^c where a=a, then b=c
so
\frac{7^9}{7^n}=7^{9-n}=7^3
7^{9-n}=7^3
so
9-n=3
-n=-6
n=6

answer is 6
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