1) 6 2/3 - 4 2/3 = 2,
2) 15 7/9 + 10 3/9 = 25 10/9 = 26 1/9,
3) 26 1/9 - 2 = 24 1/9
Ответ: 24 1/9
3 ( 2х + 4 ) + 2 ( 1 - х ) + 4 + 3х = 263
6х + 12 + 2 - 2х + 4 + 3х = 263
6х - 2х+ 3х = 263 - 12 - 2 - 4
7х = 245
х = 245 ÷ 7
х = 35.
Ответ : х = 35.
Удачи))))
583*479=279257 483*479=231357
428060;428100; 428000;430000;
30,000;26,000;25,6000;25,6100;25,6070;