9-4n=87

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Solution for 9-4n=87 equation: 



9-4n=87

We move all terms to the left:

9-4n-(87)=0

We add all the numbers together, and all the variables

-4n-78=0

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

-4n=78

n=78/-4

n=-19+1/2

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