40=5*2^n

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Solution for 40=5*2^n equation: 



40=5*2^n

We move all terms to the left:

40-(5*2^n)=0

We get rid of parentheses

-5*2^n+40=0

Wy multiply elements

-10n+40=0

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

-10n=-40

n=-40/-10

n=+4

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