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-20+6n=2n-5(4-7n)
We move all terms to the left:
-20+6n-(2n-5(4-7n))=0
We add all the numbers together, and all the variables
6n-(2n-5(-7n+4))-20=0
We calculate terms in parentheses: -(2n-5(-7n+4)), so:We get rid of parentheses
2n-5(-7n+4)
We multiply parentheses
2n+35n-20
We add all the numbers together, and all the variables
37n-20
Back to the equation:
-(37n-20)
6n-37n+20-20=0
We add all the numbers together, and all the variables
-31n=0
n=0/-31
n=0
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