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x in (-oo:+oo)
(2*(x+3))/5 = 3*x-3 // - 3*x-3
(2*(x+3))/5-(3*x)+3 = 0
(2*(x+3))/5-3*x+3 = 0
(2*(x+3))/5+(-3*5*x)/5+(3*5)/5 = 0
2*(x+3)-3*5*x+3*5 = 0
6-13*x+15 = 0
21-13*x = 0
(21-13*x)/5 = 0
(21-13*x)/5 = 0 // * 5
21-13*x = 0
21-13*x = 0 // - 21
-13*x = -21 // : -13
x = -21/(-13)
x = 21/13
x = 21/13
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