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b in (-oo:+oo)
(5/3)*b+(4/5)*b = 37/30 // - 37/30
(5/3)*b+(4/5)*b-(37/30) = 0
(5/3)*b+(4/5)*b-37/30 = 0
37/15*b-37/30 = 0 // + 37/30
37/15*b = 37/30 // : 37/15
b = 37/30/37/15
b = 1/2
b = 1/2
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