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7x-2.3=19.5
We move all terms to the left:
7x-2.3-(19.5)=0
We add all the numbers together, and all the variables
7x-21.8=0
We move all terms containing x to the left, all other terms to the right
7x=21.8
x=21.8/7
x=3+0.8/7
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