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7.9x-3.5=20.2
We move all terms to the left:
7.9x-3.5-(20.2)=0
We add all the numbers together, and all the variables
7.9x-23.7=0
We move all terms containing x to the left, all other terms to the right
7.9x=23.7
x=23.7/7.9
x=2+1/1
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