Пошаговое объяснение:
5/8х = 5/6 + 8 2/3
5/8х = 5/6 + 8 4/6
5/8х = 8 9/6
5/8х = 9 3/6
х = 9 3/6 : 5/8
х = 57/6 * 8/5
х = 57/3 * 4/5
х = 228/15
х = 15 3/15
х = 15 1/5
