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4.1+2.1x=22.9
We move all terms to the left:
4.1+2.1x-(22.9)=0
We add all the numbers together, and all the variables
2.1x-18.8=0
We move all terms containing x to the left, all other terms to the right
2.1x=18.8
x=18.8/2.1
x=8+1/1.05
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