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90=2(3-6n)
We move all terms to the left:
90-(2(3-6n))=0
We add all the numbers together, and all the variables
-(2(-6n+3))+90=0
We calculate terms in parentheses: -(2(-6n+3)), so:We get rid of parentheses
2(-6n+3)
We multiply parentheses
-12n+6
Back to the equation:
-(-12n+6)
12n-6+90=0
We add all the numbers together, and all the variables
12n+84=0
We move all terms containing n to the left, all other terms to the right
12n=-84
n=-84/12
n=-7
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