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3.7x=12.9
We move all terms to the left:
3.7x-(12.9)=0
We add all the numbers together, and all the variables
3.7x-12.9=0
We move all terms containing x to the left, all other terms to the right
3.7x=12.9
x=12.9/3.7
x=3+1/2.0555555555556
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