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x in (-oo:+oo)
1/5 > 1/6-((2/3)*x) // - 1/6-((2/3)*x)
(2/3)*x+1/5-(1/6) > 0
(2/3)*x+1/5-1/6 > 0
2/3*x+1/30 > 0 // - 1/30
2/3*x > -1/30 // : 2/3
x > -1/30/2/3
x > -1/20
x in (-1/20:+oo)
(-1/20:+oo)
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