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0.3x=2.1x=
We move all terms to the left:
0.3x-(2.1x)=0
We add all the numbers together, and all the variables
0.3x-(+2.1x)=0
We get rid of parentheses
0.3x-2.1x=0
We add all the numbers together, and all the variables
-1.8x=0
x=0/-1.8
x=0
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