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4n-40=7(-20+2)
We move all terms to the left:
4n-40-(7(-20+2))=0
We add all the numbers together, and all the variables
4n-40-(7(-18))=0
We add all the numbers together, and all the variables
4n+86=0
We move all terms containing n to the left, all other terms to the right
4n=-86
n=-86/4
n=-21+1/2
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