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1.9x+x=5.8
We move all terms to the left:
1.9x+x-(5.8)=0
We add all the numbers together, and all the variables
2.9x-5.8=0
We move all terms containing x to the left, all other terms to the right
2.9x=5.8
x=5.8/2.9
x=2
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