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20=3(n-10)+2
We move all terms to the left:
20-(3(n-10)+2)=0
We calculate terms in parentheses: -(3(n-10)+2), so:We get rid of parentheses
3(n-10)+2
We multiply parentheses
3n-30+2
We add all the numbers together, and all the variables
3n-28
Back to the equation:
-(3n-28)
-3n+28+20=0
We add all the numbers together, and all the variables
-3n+48=0
We move all terms containing n to the left, all other terms to the right
-3n=-48
n=-48/-3
n=+16
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