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1.2x+3.3=2.1
We move all terms to the left:
1.2x+3.3-(2.1)=0
We add all the numbers together, and all the variables
1.2x+1.2=0
We move all terms containing x to the left, all other terms to the right
1.2x=-1.2
x=-1.2/1.2
x=-1
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