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x in (-oo:+oo)
2/16 = x/80 // - x/80
2/16-(x/80) = 0
1/8-1/80*x = 0 // - 1/8
-1/80*x = -1/8 // : -1/80
x = -1/8/(-1/80)
x = 10
x = 10
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