Решите уровнение а) 3/5+х=4/5 б) y-2/7=6/7 в) 11/25-k=7/25 г)d+2/9=1/9+7/9

3/5+х=4/5         y-2/7=6/7               d+2/9=1/9+7/9                  11/25-k=7/25

х=4/5-3/5           y=6/7+2/7             d=1/9+7/9-2/9                     11/25-7/25=k

х=1/5                 y=8/7                       d=6/9                                       k=4/25

                             y= 1 1/7