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x in (-oo:+oo)
x/2-35 = 3*x // - 3*x
x/2-(3*x)-35 = 0
x/2-3*x-35 = 0
-5/2*x-35 = 0 // + 35
-5/2*x = 35 // : -5/2
x = 35/(-5/2)
x = -14
x = -14
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