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x in (-oo:+oo)
(4*(x-2))/5 = x-3 // - x-3
(4*(x-2))/5-x+3 = 0
(4*(x-2))/5+(5*(-x))/5+(3*5)/5 = 0
4*(x-2)+5*(-x)+3*5 = 0
15-x-8 = 0
7-x = 0
(7-x)/5 = 0
(7-x)/5 = 0 // * 5
7-x = 0
7-x = 0 // - 7
-x = -7 // * -1
x = 7
x = 7
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