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x in (-oo:+oo)
x/12 = 24/24-x // - 24/24-x
x/12+x-(24/24) = 0
x/12+x-1 = 0
13/12*x-1 = 0 // + 1
13/12*x = 1 // : 13/12
x = 1/13/12
x = 12/13
x = 12/13
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