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y in (-oo:+oo)
(2/3)*y-((5/4)*y)+8 = (11/12)*y-4 // - (11/12)*y-4
(2/3)*y-((5/4)*y)-((11/12)*y)+4+8 = 0
(2/3)*y+(-5/4)*y+(-11/12)*y+4+8 = 0
12-3/2*y = 0 // - 12
-3/2*y = -12 // : -3/2
y = -12/(-3/2)
y = 8
y = 8
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