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28=-4(1n+15)
We move all terms to the left:
28-(-4(1n+15))=0
We add all the numbers together, and all the variables
-(-4(n+15))+28=0
We calculate terms in parentheses: -(-4(n+15)), so:We get rid of parentheses
-4(n+15)
We multiply parentheses
-4n-60
Back to the equation:
-(-4n-60)
4n+60+28=0
We add all the numbers together, and all the variables
4n+88=0
We move all terms containing n to the left, all other terms to the right
4n=-88
n=-88/4
n=-22
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