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18-3x=340-3x+12x
We move all terms to the left:
18-3x-(340-3x+12x)=0
We add all the numbers together, and all the variables
-3x-(9x+340)+18=0
We get rid of parentheses
-3x-9x-340+18=0
We add all the numbers together, and all the variables
-12x-322=0
We move all terms containing x to the left, all other terms to the right
-12x=322
x=322/-12
x=-26+5/6
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