Question

Solve-25^x=125^x-7
*Thx*

Answer 1

If that is:

-25^x=125^(x-7)

-5^2^x=5^3^(x-7)

-5^(2x)=5^(3x-21)

5^(3x-21)-5^(2x)=0 for this to be true

3x-21=2x

x-21=0

x=21