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113.5=7.75+4.5(18-n)
We move all terms to the left:
113.5-(7.75+4.5(18-n))=0
We add all the numbers together, and all the variables
-(7.75+4.5(-1n+18))+113.5=0
We calculate terms in parentheses: -(7.75+4.5(-1n+18)), so:We get rid of parentheses
7.75+4.5(-1n+18)
determiningTheFunctionDomain 4.5(-1n+18)+7.75
We multiply parentheses
-4.5n+81+7.75
We add all the numbers together, and all the variables
-4.5n+88.75
Back to the equation:
-(-4.5n+88.75)
4.5n-88.75+113.5=0
We add all the numbers together, and all the variables
4.5n+24.75=0
We move all terms containing n to the left, all other terms to the right
4.5n=-24.75
n=-24.75/4.5
n=-5+1/2
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