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