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0.3x-2.1=1.2
We move all terms to the left:
0.3x-2.1-(1.2)=0
We add all the numbers together, and all the variables
0.3x-3.3=0
We move all terms containing x to the left, all other terms to the right
0.3x=3.3
x=3.3/0.3
x=11
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