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x in (-oo:+oo)
-16/15 = (1/2)*x // - (1/2)*x
-((1/2)*x)-16/15 = 0
(-1/2)*x-16/15 = 0
-1/2*x-16/15 = 0 // + 16/15
-1/2*x = 16/15 // : -1/2
x = 16/15/(-1/2)
x = -32/15
x = -32/15
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