-5n+7.5=22.5

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Solution for -5n+7.5=22.5 equation: 



-5n+7.5=22.5

We move all terms to the left:

-5n+7.5-(22.5)=0

We add all the numbers together, and all the variables

-5n-15=0

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

-5n=15

n=15/-5

n=-3

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