7.5=-1.5n

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Solution for 7.5=-1.5n equation: 



7.5=-1.5n

We move all terms to the left:

7.5-(-1.5n)=0

We get rid of parentheses

1.5n+7.5=0

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

1.5n=-7.5

n=-7.5/1.5

n=-5

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