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b in (-oo:+oo)
(3/4)*b-8 = -133/16 // + -133/16
(3/4)*b-(-133/16)-8 = 0
(3/4)*b+133/16-8 = 0
3/4*b+5/16 = 0 // - 5/16
3/4*b = -5/16 // : 3/4
b = -5/16/3/4
b = -5/12
b = -5/12
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