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x in (-oo:+oo)
2/8 = x/48 // - x/48
2/8-(x/48) = 0
1/4-1/48*x = 0 // - 1/4
-1/48*x = -1/4 // : -1/48
x = -1/4/(-1/48)
x = 12
x = 12
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