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x in (-oo:+oo)
2-(x/4)-(3/8) > (2/5)*x // - (2/5)*x
2-(x/4)-((2/5)*x)-(3/8) > 0
(-2/5)*x-(x/4)-3/8+2 > 0
13/8-13/20*x > 0 // - 13/8
-13/20*x > -13/8 // : -13/20
x < -13/8/(-13/20)
x < 5/2
x in (-oo:5/2)
(-oo:5/2)
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