Ответ:
а) \(8-y=4\frac{1}{7}\).
\(y=8-4\frac{1}{7}=3\frac{6}{7}\).
б) \(4\frac{3}{8}+x=6\frac{1}{8}\).
\(x=6\frac{1}{8}-4\frac{3}{8}=1\frac{6}{8}=1\frac{3}{4}\).
в) \(8\frac{7}{39}-x=5\frac{9}{26}\).
\(x=8\frac{7}{39}-5\frac{9}{26}=8\frac{14}{78}-5\frac{27}{78}=2\frac{65}{78}=2\frac{5}{6}\).
г) \(y+3\frac{11}{52}=8\frac{7}{39}\).
\(y=8\frac{7}{39}-3\frac{11}{52}=8\frac{28}{156}-3\frac{33}{156}=4\frac{151}{156}\).
Ответ: а) \(y=3\frac{6}{7}\); б) \(x=1\frac{3}{4}\); в) \(x=2\frac{5}{6}\); г) \(y=4\frac{151}{156}\).
