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y in (-oo:+oo)
y/4+4 = (3*y)/8-3 // - (3*y)/8-3
y/4-((3*y)/8)+3+4 = 0
y/4+(-3/8)*y+3+4 = 0
7-1/8*y = 0 // - 7
-1/8*y = -7 // : -1/8
y = -7/(-1/8)
y = 56
y = 56
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