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-7(-2n-9)+3=3n
We move all terms to the left:
-7(-2n-9)+3-(3n)=0
We add all the numbers together, and all the variables
-3n-7(-2n-9)+3=0
We multiply parentheses
-3n+14n+63+3=0
We add all the numbers together, and all the variables
11n+66=0
We move all terms containing n to the left, all other terms to the right
11n=-66
n=-66/11
n=-6
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