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-156=-5n-3(6+6n)
We move all terms to the left:
-156-(-5n-3(6+6n))=0
We add all the numbers together, and all the variables
-(-5n-3(6n+6))-156=0
We calculate terms in parentheses: -(-5n-3(6n+6)), so:We get rid of parentheses
-5n-3(6n+6)
We multiply parentheses
-5n-18n-18
We add all the numbers together, and all the variables
-23n-18
Back to the equation:
-(-23n-18)
23n+18-156=0
We add all the numbers together, and all the variables
23n-138=0
We move all terms containing n to the left, all other terms to the right
23n=138
n=138/23
n=6
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