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x in (-oo:+oo)
2/3 = x/39 // - x/39
2/3-(x/39) = 0
2/3-1/39*x = 0 // - 2/3
-1/39*x = -2/3 // : -1/39
x = -2/3/(-1/39)
x = 26
x = 26
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