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-12x+4.3=-2x+21.2
We move all terms to the left:
-12x+4.3-(-2x+21.2)=0
We get rid of parentheses
-12x+2x-21.2+4.3=0
We add all the numbers together, and all the variables
-10x-16.9=0
We move all terms containing x to the left, all other terms to the right
-10x=16.9
x=16.9/-10
x=-1+2.3793103448276/3.448275862069
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