Answer:
m = 6
Step-by-step explanation:
Here, we want to find the value of m
To do this, we use the indices addition property for multiplication
On the left hand side;
5^(2 + m + 7) = 5^15
5^(m + 9) = 5^15
since the bases are equal, we equate the powers
m + 9 = 15
m = 15-9
m = 6
