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3.1x=5.2=9.9
We move all terms to the left:
3.1x-(5.2)=0
We add all the numbers together, and all the variables
3.1x-5.2=0
We move all terms containing x to the left, all other terms to the right
3.1x=5.2
x=5.2/3.1
x=1+2.1/3.1
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