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3.1x=57.2
We move all terms to the left:
3.1x-(57.2)=0
We add all the numbers together, and all the variables
3.1x-57.2=0
We move all terms containing x to the left, all other terms to the right
3.1x=57.2
x=57.2/3.1
x=18+1/2.2142857142857
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