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x in (-oo:+oo)
(12*x-12)/5 = 4*x+3 // - 4*x+3
(12*x-12)/5-(4*x)-3 = 0
(12*x-12)/5-4*x-3 = 0
(12*x-12)/5+(-4*5*x)/5+(-3*5)/5 = 0
12*x-4*5*x-3*5-12 = 0
-8*x-15-12 = 0
-8*x-27 = 0
(-8*x-27)/5 = 0
(-8*x-27)/5 = 0 // * 5
-8*x-27 = 0
-8*x-27 = 0 // + 27
-8*x = 27 // : -8
x = 27/(-8)
x = -27/8
x = -27/8
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