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x in (-oo:+oo)
20/102 = x/155 // - x/155
20/102-(x/155) = 0
10/51-1/155*x = 0 // - 10/51
-1/155*x = -10/51 // : -1/155
x = -10/51/(-1/155)
x = 1550/51
x = 1550/51
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