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3.7x-12=2.8
We move all terms to the left:
3.7x-12-(2.8)=0
We add all the numbers together, and all the variables
3.7x-14.8=0
We move all terms containing x to the left, all other terms to the right
3.7x=14.8
x=14.8/3.7
x=4
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