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1.2x-2.1=1.5x-2.1
We move all terms to the left:
1.2x-2.1-(1.5x-2.1)=0
We get rid of parentheses
1.2x-1.5x+2.1-2.1=0
We add all the numbers together, and all the variables
-0.3x=0
x=0/-0.3
x=0
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