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y in (-oo:+oo)
5-1/2-8 = 3*y-2 // - 3*y-2
2-(3*y)-1/2-8+5 = 0
2-3*y-1/2-8+5 = 0
-3*y-3/2 = 0 // + 3/2
-3*y = 3/2 // : -3
y = 3/2/(-3)
y = -1/2
y = -1/2
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