Решите уравнение: а) 5/9x=2 1/3. б)14/39:x21/59
5/9х=2 1/3 5/9х=7/3 х=7/3:5/9 7/3:5/9=7/3*9/5=21/5=4 1/5 x=4целых1/5 14/39:x=21/52 x=14/39:21/52 14/39:21/52=14/39*52/21=104/117=8/9 x=8/9