4=(-0.8)n

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Solution for 4=(-0.8)n equation: 



4=(-0.8)n

We move all terms to the left:

4-((-0.8)n)=0



We calculate terms in parentheses: -((-0.8)n), so:

(-0.8)n

We multiply parentheses

-0.8n

Back to the equation:

-(-0.8n)



We get rid of parentheses

0.8n+4=0

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

0.8n=-4

n=-4/0.8

n=-5

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