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4n+1.n=1-13
We move all terms to the left:
4n+1.n-(1-13)=0
We add all the numbers together, and all the variables
4n+1.n-(-12)=0
We add all the numbers together, and all the variables
5n+12=0
We move all terms containing n to the left, all other terms to the right
5n=-12
n=-12/5
n=-2+2/5
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