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19n=2(5n+18)
We move all terms to the left:
19n-(2(5n+18))=0
We calculate terms in parentheses: -(2(5n+18)), so:We get rid of parentheses
2(5n+18)
We multiply parentheses
10n+36
Back to the equation:
-(10n+36)
19n-10n-36=0
We add all the numbers together, and all the variables
9n-36=0
We move all terms containing n to the left, all other terms to the right
9n=36
n=36/9
n=4
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