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0.5x+2.1=5.5
We move all terms to the left:
0.5x+2.1-(5.5)=0
We add all the numbers together, and all the variables
0.5x-3.4=0
We move all terms containing x to the left, all other terms to the right
0.5x=3.4
x=3.4/0.5
x=6+0.4/0.5
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