7-2.5n=13

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Solution for 7-2.5n=13 equation: 



7-2.5n=13

We move all terms to the left:

7-2.5n-(13)=0

We add all the numbers together, and all the variables

-2.5n-6=0

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

-2.5n=6

n=6/-2.5

n=-2+1/2.5

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