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x in (-oo:+oo)
(4*x)/5+6 = 3*x+4 // - 3*x+4
(4*x)/5-(3*x)-4+6 = 0
(4*x)/5-3*x-4+6 = 0
2-11/5*x = 0 // - 2
-11/5*x = -2 // : -11/5
x = -2/(-11/5)
x = 10/11
x = 10/11
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