Х+(619-392)=791+320
х+(619-392)=1111
х+227=1111
х=1111-227
х=884
Нельзя только в первом третие)))))
1.5 5//19=99/19
2. 3 4//7=25//7
3.(99//19)*(25//7)=(2475//133)
4. 1 15//19=34//19
5.7//25=0,28
6. (34//19)/0,28=(850//133)
7.(2475//133)+(850//133)=25
8. 1 2//3=5//3
9. 25-(5//3)=(70//3)
Ответ...................
(99,99-6,54):(-62,3)*(-0,3) = 93,45:(-62,3)*(-0,3)=0,45