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-150=-5(2+4n)
We move all terms to the left:
-150-(-5(2+4n))=0
We add all the numbers together, and all the variables
-(-5(4n+2))-150=0
We calculate terms in parentheses: -(-5(4n+2)), so:We get rid of parentheses
-5(4n+2)
We multiply parentheses
-20n-10
Back to the equation:
-(-20n-10)
20n+10-150=0
We add all the numbers together, and all the variables
20n-140=0
We move all terms containing n to the left, all other terms to the right
20n=140
n=140/20
n=7
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