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3x-5x+12=8x+2x
We move all terms to the left:
3x-5x+12-(8x+2x)=0
We add all the numbers together, and all the variables
3x-5x-(+10x)+12=0
We add all the numbers together, and all the variables
-2x-(+10x)+12=0
We get rid of parentheses
-2x-10x+12=0
We add all the numbers together, and all the variables
-12x+12=0
We move all terms containing x to the left, all other terms to the right
-12x=-12
x=-12/-12
x=1
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