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x in (-oo:+oo)
x/8 = 12/24 // - 12/24
x/8-(12/24) = 0
x/8-1/2 = 0
1/8*x-1/2 = 0 // + 1/2
1/8*x = 1/2 // : 1/8
x = 1/2/1/8
x = 4
x = 4
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