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x in (-oo:+oo)
(1/3)*x-(5/2) = -2*x // + -2*x
(1/3)*x-(-2*x)-(5/2) = 0
(1/3)*x+2*x-5/2 = 0
7/3*x-5/2 = 0 // + 5/2
7/3*x = 5/2 // : 7/3
x = 5/2/7/3
x = 15/14
x = 15/14
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