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6(2n-7)=-90
We move all terms to the left:
6(2n-7)-(-90)=0
We add all the numbers together, and all the variables
6(2n-7)+90=0
We multiply parentheses
12n-42+90=0
We add all the numbers together, and all the variables
12n+48=0
We move all terms containing n to the left, all other terms to the right
12n=-48
n=-48/12
n=-4
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