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-29=-4n-9
We move all terms to the left:
-29-(-4n-9)=0
We get rid of parentheses
4n+9-29=0
We add all the numbers together, and all the variables
4n-20=0
We move all terms containing n to the left, all other terms to the right
4n=20
n=20/4
n=5
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