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70=5n-5(4n-2)
We move all terms to the left:
70-(5n-5(4n-2))=0
We calculate terms in parentheses: -(5n-5(4n-2)), so:We get rid of parentheses
5n-5(4n-2)
We multiply parentheses
5n-20n+10
We add all the numbers together, and all the variables
-15n+10
Back to the equation:
-(-15n+10)
15n-10+70=0
We add all the numbers together, and all the variables
15n+60=0
We move all terms containing n to the left, all other terms to the right
15n=-60
n=-60/15
n=-4
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