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2.1x-3.2=5.2
We move all terms to the left:
2.1x-3.2-(5.2)=0
We add all the numbers together, and all the variables
2.1x-8.4=0
We move all terms containing x to the left, all other terms to the right
2.1x=8.4
x=8.4/2.1
x=4
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