Пошаговое объяснение:
7,87 - (4 11/35 - x) - 5/7 = 3,62 + 8 2/5
7,87 - (4 11/35 - x) - 5/7 = 3,62 + 8,4
7,87 - (4 11/35 - x) - 5/7 = 12,02
-4 11/35 + x - 25/35 = 12,02 - 7,87
-4 36/35 + x = 4,15
-5 1/35 + x = 4,15
x = 4,15 + 5 1/35
x = 4 3/20 + 5 1/35
x = 4 21/140 + 5 4/140
x = 9 25/140
x = 9 5/28
