Question

hi, please solve this question. If you don't know the answer please ignore, because a question can have only two answers. so... If you know the answer only then answer​

Answer 1

Answer:

m=-1

Step-by-step explanation:

9^-3m ÷ 9^-4 = 9^7

9^(-3m-(-4)) = 9^7

-3m + 4 = 7

4-7 = 3m

-3= 3m

-1=m