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6.8x-2.1=52.3
We move all terms to the left:
6.8x-2.1-(52.3)=0
We add all the numbers together, and all the variables
6.8x-54.4=0
We move all terms containing x to the left, all other terms to the right
6.8x=54.4
x=54.4/6.8
x=8
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