Х-3/7=4/21 4/5-х=1/6 5/8-х=1/3 дроби

Х - 3/7 = 4/21 х = 4/21 + 3/7 х = 4/21 + 9/21 х = 13/21 4/5 - х = 1/6 х = 4/5 - 1/6 х = 24/30 - 5/30 х = 19/30 5/8 - х = 1/3 х = 5/8 - 1/3 х = 15/24 - 8/24 х = 7/24