Question 416592
Since the bases are all the same, you can add the exponents on the left side to get: 3m+(-m) = 3m-m = 2m



Now you can equate exponents (again, they're all the same) to get: 2m = -2m



Now solve for m to get: 2m+2m = 0 ----> 4m=0 ---> m = 0


So the solution is m = 0



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