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3.1x-8.12=4.9
We move all terms to the left:
3.1x-8.12-(4.9)=0
We add all the numbers together, and all the variables
3.1x-13.02=0
We move all terms containing x to the left, all other terms to the right
3.1x=13.02
x=13.02/3.1
x=4+0.62/3.1
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