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x in (-oo:+oo)
(2/5)*x-((3/2)*x) = (3/4)*x+2 // - (3/4)*x+2
(2/5)*x-((3/2)*x)-((3/4)*x)-2 = 0
(2/5)*x+(-3/2)*x+(-3/4)*x-2 = 0
-37/20*x-2 = 0 // + 2
-37/20*x = 2 // : -37/20
x = 2/(-37/20)
x = -40/37
x = -40/37
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