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x in (-oo:+oo)
234/10 = x/2 // - x/2
234/10-(x/2) = 0
117/5-1/2*x = 0 // - 117/5
-1/2*x = -117/5 // : -1/2
x = -117/5/(-1/2)
x = 234/5
x = 234/5
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