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(4n-5)+155=90
We move all terms to the left:
(4n-5)+155-(90)=0
We add all the numbers together, and all the variables
(4n-5)+65=0
We get rid of parentheses
4n-5+65=0
We add all the numbers together, and all the variables
4n+60=0
We move all terms containing n to the left, all other terms to the right
4n=-60
n=-60/4
n=-15
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