разгадать ребус :
1) 2 22
2) 2 15

8* (х - 1,4) = 0,56 х - 1,4 = 0,56 : 8х  - 1,4 = 0,07 х = 0,07  + 1,4х = 1,47 проверим: 8* (1,47 - 1,4) = 0,568 * 0,07 = 0,560,56 = 0,56 (4,6 - х) * 19  = 4,18 4,6 - х = 4,18 : 19 4,6  - х =0,22 х= 4,6 - 0,22 х =4,38 проверим: (4,60 - 4,38 ) * 19 = 4,180,22*19=4,184,18 = 4,18 (51,32 + х ) * 0,12 = 72 51,32 + х = 72 : 0,1251,32 + х = 600 х=600,00 - 51,32 х = 548,68 проверим: (51,32 + 548,68)  * 0,12 = 72600  * 0,12 = 7272=72 17,28/(56-х) = 36 знаменатель не может быть равен  0 56 - х ≠ 0 х ≠  - 5636(56-х) = 17,282016  - 36 х = 17,28-36 х= 17,28 - 2016 36х = 2016,00 - 17,2836 х = 1998,72 х= 1998,72 / 36  х = 55,52 проверим: 17,28 / (56 - 55,52) = 3617,28 / 0,48 = 361728 / 48  =  3636=36

108•4=442    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍    ‌‌‍‍