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solve 8^3x-3=4^3x-4
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= .
Write both sides with the base "2" using 8 = and 4 = . You will get
= .
Since the base are equal, the indexes are equal too:
3*(3x-3) = 2*(3x-4).
Simplify and solve it for x.
By the way, here is how to write correctly your equation when posting to this site:
8^(3x-3) = 4^(3x-4).
Use it when you will be posting next time.