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x in (-oo:+oo)
3*(x-3)-((3*x)/5) = 8 // - 8
3*(x-3)-((3*x)/5)-8 = 0
3*(x-3)+(-3/5)*x-8 = 0
3*(x-3)+(-3*x)/5-8 = 0
(3*5*(x-3))/5+(-3*x)/5+(-8*5)/5 = 0
3*5*(x-3)-3*x-8*5 = 0
12*x-45-40 = 0
12*x-85 = 0
(12*x-85)/5 = 0
(12*x-85)/5 = 0 // * 5
12*x-85 = 0
12*x-85 = 0 // + 85
12*x = 85 // : 12
x = 85/12
x = 85/12
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