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12x+3x-2x=6+18-13x
We move all terms to the left:
12x+3x-2x-(6+18-13x)=0
We add all the numbers together, and all the variables
12x+3x-2x-(-13x+24)=0
We add all the numbers together, and all the variables
13x-(-13x+24)=0
We get rid of parentheses
13x+13x-24=0
We add all the numbers together, and all the variables
26x-24=0
We move all terms containing x to the left, all other terms to the right
26x=24
x=24/26
x=12/13
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