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x in (-oo:+oo)
x = 99-(2*x)-((1/2)*x)-((1/3)*x) // - 99-(2*x)-((1/2)*x)-((1/3)*x)
x+2*x+(1/2)*x+(1/3)*x-99 = 0
23/6*x-99 = 0 // + 99
23/6*x = 99 // : 23/6
x = 99/23/6
x = 594/23
x = 594/23
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