2x + \(\dfrac{2x+1}{2}\) > 3x - \(\dfrac{1}{5}\)
\(\Leftrightarrow\) 2x.10 + (2x+1).5 > 3x.10 - 1.2
\(\Leftrightarrow\) 20x + 10x + 5 > 30x - 2
\(\Leftrightarrow\) 20x + 10x - 30x > - 2 - 5
\(\Leftrightarrow\) 0x > -7
Vậy: S = \(\varnothing\)
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=>20x+10x+5>60x-2
=>30x+5>60x-2
=>-30x>-3
hay x<1/10
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