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2.8x-3.9-6.7=13.65
We move all terms to the left:
2.8x-3.9-6.7-(13.65)=0
We add all the numbers together, and all the variables
2.8x-24.25=0
We move all terms containing x to the left, all other terms to the right
2.8x=24.25
x=24.25/2.8
x=8+1/1.5135135135135
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