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y in (-oo:+oo)
(-3/8)*y = 3/16-(9/16) // - 3/16-(9/16)
(-3/8)*y-(3/16)+9/16 = 0
(-3/8)*y-3/16+9/16 = 0
3/8-3/8*y = 0 // - 3/8
-3/8*y = -3/8 // : -3/8
y = -3/8/(-3/8)
y = 1
y = 1
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