1) 57,3-11*х=18,14
39.16-11*x=0
x=39.16/11
x=3.56
2) 17,6:х-2,27=1,73
17.6:x-4=0x=17.6:4
x=4.4
3) 4,36-5,28:х=1,36
3-5.28:x=0x=-5.28:(-3)
x=1.76
4) (х+2,67) : 7=0,86
x/7=67/140x=67/140*7
x=3.35
26\5÷13\45×7\9=
(26×45×7)\(5×13×9)=
2×7=
14
ответ: 14