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x in (-oo:+oo)
13/18 = x/45 // - x/45
13/18-(x/45) = 0
13/18-1/45*x = 0 // - 13/18
-1/45*x = -13/18 // : -1/45
x = -13/18/(-1/45)
x = 65/2
x = 65/2
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