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-6(n-5)=-3(n-4)
We move all terms to the left:
-6(n-5)-(-3(n-4))=0
We multiply parentheses
-6n-(-3(n-4))+30=0
We calculate terms in parentheses: -(-3(n-4)), so:We get rid of parentheses
-3(n-4)
We multiply parentheses
-3n+12
Back to the equation:
-(-3n+12)
-6n+3n-12+30=0
We add all the numbers together, and all the variables
-3n+18=0
We move all terms containing n to the left, all other terms to the right
-3n=-18
n=-18/-3
n=+6
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