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2.1=x-12.17
We move all terms to the left:
2.1-(x-12.17)=0
We get rid of parentheses
-x+12.17+2.1=0
We add all the numbers together, and all the variables
-1x+14.27=0
We move all terms containing x to the left, all other terms to the right
-x=-14.27
x=-14.27/-1
x=14+0.27/1
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