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x in (-oo:+oo)
(2/5)*(10*x-3)-x = 9/5 // - 9/5
(2/5)*(10*x-3)-x-(9/5) = 0
(2/5)*(10*x-3)-x-9/5 = 0
2/5*(10*x-3)-x-9/5 = 0
(2/5*5*(10*x-3))/5+(5*(-x))/5-9/5 = 0
2/5*5*(10*x-3)+5*(-x)-9 = 0
15*x-9-6 = 0
15*x-15 = 0
(15*x-15)/5 = 0
(15*x-15)/5 = 0 // * 5
15*x-15 = 0
15*x-15 = 0 // + 15
15*x = 15 // : 15
x = 15/15
x = 1
x = 1
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