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12=9x+13-14x
We move all terms to the left:
12-(9x+13-14x)=0
We add all the numbers together, and all the variables
-(-5x+13)+12=0
We get rid of parentheses
5x-13+12=0
We add all the numbers together, and all the variables
5x-1=0
We move all terms containing x to the left, all other terms to the right
5x=1
x=1/5
x=1/5
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