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X+3-4X=12+2X
We move all terms to the left:
X+3-4X-(12+2X)=0
We add all the numbers together, and all the variables
X-4X-(2X+12)+3=0
We add all the numbers together, and all the variables
-3X-(2X+12)+3=0
We get rid of parentheses
-3X-2X-12+3=0
We add all the numbers together, and all the variables
-5X-9=0
We move all terms containing X to the left, all other terms to the right
-5X=9
X=9/-5
X=-1+4/5
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