1) 5,2-3,8=1,4
2)6,94-5,08=1,86
3)6,14+2,88+1,4-1,86=8,56
1 и 13. 221**13=17 247**13=19
(17/13*x-13/2)*(3,125-33/32)=67/16
(17/13*x-6,5)*(3,125-1,03125)=4,1875
(17/13*x-6,5)*2,09375=4,1875
17/13*x-6,5=4,1875:2,09375
17/13*x-6,5=2
5,6х=6,5+2=8,5
х=8,5:5,6
х=1,517...
1. Х= 635, 636, ....
2. Х= 1-641 (от 1 до 641)