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2.8x-5.82=7.9
We move all terms to the left:
2.8x-5.82-(7.9)=0
We add all the numbers together, and all the variables
2.8x-13.72=0
We move all terms containing x to the left, all other terms to the right
2.8x=13.72
x=13.72/2.8
x=4+1/1.1111111111111
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