128=8*1.5^n

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Solution for 128=8*1.5^n equation: 



128=8*1.5^n

We move all terms to the left:

128-(8*1.5^n)=0

We get rid of parentheses

-8*1.5^n+128=0

Wy multiply elements

-8n+128=0

We move all terms containing n to the left, all other terms to the right

-8n=-128

n=-128/-8

n=+16

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