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2.3x+3.9=5.78
We move all terms to the left:
2.3x+3.9-(5.78)=0
We add all the numbers together, and all the variables
2.3x-1.88=0
We move all terms containing x to the left, all other terms to the right
2.3x=1.88
x=1.88/2.3
x=1/1.2234042553191
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