х=10 17/42
Пошаговое объяснение:
х-9 3/7=6 5/14-5 8/21
х-9 3/7=6 15/42-5 16/42
х-9 3/7=5 57/42-5 16/42
х-9 3/7=41/42
х=41/42+9 3/7
х=41/42+9 18/42
х=9 59/42
