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43(n+3)=9
We move all terms to the left:
43(n+3)-(9)=0
We multiply parentheses
43n+129-9=0
We add all the numbers together, and all the variables
43n+120=0
We move all terms containing n to the left, all other terms to the right
43n=-120
n=-120/43
n=-2+34/43
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