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4-n=3.87.
We move all terms to the left:
4-n-(3.87.)=0
We add all the numbers together, and all the variables
-n+4-0=0
We add all the numbers together, and all the variables
-1n+4=0
We move all terms containing n to the left, all other terms to the right
-n=-4
n=-4/-1
n=+4
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