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7x-3x-2x=2.2
We move all terms to the left:
7x-3x-2x-(2.2)=0
We add all the numbers together, and all the variables
2x-2.2=0
We move all terms containing x to the left, all other terms to the right
2x=2.2
x=2.2/2
x=1+0.2/2
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