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100=4(4n-5)
We move all terms to the left:
100-(4(4n-5))=0
We calculate terms in parentheses: -(4(4n-5)), so:We get rid of parentheses
4(4n-5)
We multiply parentheses
16n-20
Back to the equation:
-(16n-20)
-16n+20+100=0
We add all the numbers together, and all the variables
-16n+120=0
We move all terms containing n to the left, all other terms to the right
-16n=-120
n=-120/-16
n=7+1/2
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