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12+1=11x+9
We move all terms to the left:
12+1-(11x+9)=0
We add all the numbers together, and all the variables
-(11x+9)+13=0
We get rid of parentheses
-11x-9+13=0
We add all the numbers together, and all the variables
-11x+4=0
We move all terms containing x to the left, all other terms to the right
-11x=-4
x=-4/-11
x=4/11
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