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25+(2n+4)=30
We move all terms to the left:
25+(2n+4)-(30)=0
We add all the numbers together, and all the variables
(2n+4)-5=0
We get rid of parentheses
2n+4-5=0
We add all the numbers together, and all the variables
2n-1=0
We move all terms containing n to the left, all other terms to the right
2n=1
n=1/2
n=1/2
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