1) 36:4 - х = х-5
9 +5 =х+х=2х
х=14 :2=7 х=7
Проверка 36:4-7=7-5 2=2
2) ((4+2)*7=6*...
6*7=6*..., 6*7=6*7, ответ - 7
Проверка: (4+2)*7 = 6*7
3) ...(9-3)*....=48:....*
4) 9*(5+4) :9 = 81 :...
9*9:9 = 81:х 9= 81 :х х=81:9 = 9
5) 56 : (15-7) + 4 = 4 + ....
56 : 8 +4 = 4 + х
7+4 = 4+х х=4