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b in (-oo:+oo)
9/16 = (3*b)/8 // - (3*b)/8
9/16-((3*b)/8) = 0
(-3/8)*b+9/16 = 0
9/16-3/8*b = 0 // - 9/16
-3/8*b = -9/16 // : -3/8
b = -9/16/(-3/8)
b = 3/2
b = 3/2
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