Asked by Kim

Explain how you can use mental math to solve the equation 8^(x-4)=1.
Answered by Reiny
anything to the zero is 1, meaning 8^0 = 1
so x-4 = 0
mentally: x = 4
Answered by dfghjk
Why does the method for solving bx=by by solving x=y not work when b=1? Give an example to justify your answer.
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