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-155=-5(1-5n)
We move all terms to the left:
-155-(-5(1-5n))=0
We add all the numbers together, and all the variables
-(-5(-5n+1))-155=0
We calculate terms in parentheses: -(-5(-5n+1)), so:We get rid of parentheses
-5(-5n+1)
We multiply parentheses
25n-5
Back to the equation:
-(25n-5)
-25n+5-155=0
We add all the numbers together, and all the variables
-25n-150=0
We move all terms containing n to the left, all other terms to the right
-25n=150
n=150/-25
n=-6
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