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n-3+4n=-9+2n
We move all terms to the left:
n-3+4n-(-9+2n)=0
We add all the numbers together, and all the variables
n+4n-(2n-9)-3=0
We add all the numbers together, and all the variables
5n-(2n-9)-3=0
We get rid of parentheses
5n-2n+9-3=0
We add all the numbers together, and all the variables
3n+6=0
We move all terms containing n to the left, all other terms to the right
3n=-6
n=-6/3
n=-2
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