а) \(\frac{11}{12}-y=\frac{11}{24}\).\(y=\frac{11}{12}-\frac{11}{24}=\frac{22}{24}-\frac{11}{24}=\frac{11}{24}\).
б) \(5.86m+1.4m=76.23\); \(7.26m=76.23\); \(m=76.23:7.26=10.5\).
Ответ: а) \(y=\frac{11}{24}\); б) \(m=10.5\).