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x in (-oo:+oo)
2/6 = x/198 // - x/198
2/6-(x/198) = 0
1/3-1/198*x = 0 // - 1/3
-1/198*x = -1/3 // : -1/198
x = -1/3/(-1/198)
x = 66
x = 66
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