Question

125 ^{X+7} =25 ^{3X-4}??

Answer 1

125^{x+7}=25^{3x-4}
5^3{x+7}=5^2{3x-4}
3{x+7}=2{3x-4}
3x+7=6x-8
3x-6x=-8-7
-3x=-15
x=-15/-3
x=5

Answer 2

5^3^{X+7} = 5^2{3X-4}
3(X+7) =2(3X-4)
3X+21=6X-8
3X-6X=(-8) - 21
-3X = -29
X= 29/3