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85=5n-5(1+4n)
We move all terms to the left:
85-(5n-5(1+4n))=0
We add all the numbers together, and all the variables
-(5n-5(4n+1))+85=0
We calculate terms in parentheses: -(5n-5(4n+1)), so:We get rid of parentheses
5n-5(4n+1)
We multiply parentheses
5n-20n-5
We add all the numbers together, and all the variables
-15n-5
Back to the equation:
-(-15n-5)
15n+5+85=0
We add all the numbers together, and all the variables
15n+90=0
We move all terms containing n to the left, all other terms to the right
15n=-90
n=-90/15
n=-6
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