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x in (-oo:+oo)
(3*x)/5-(2/3) = 4*x // - 4*x
(3*x)/5-(4*x)-(2/3) = 0
(3*x)/5-4*x-2/3 = 0
-17/5*x-2/3 = 0 // + 2/3
-17/5*x = 2/3 // : -17/5
x = 2/3/(-17/5)
x = -10/51
x = -10/51
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