Найдите Х 1) 4 7 2 3--- - ( х - 1 --- ) = 2 --- 9 9 9 2) 6 7 13 23 --- - ( х + 7 --- ) = 12 ---- 19 1919
1) 31\4 - ( 9X - 16 ) \ 9 = 20\9 9*31 - 4*(9X-16) = 80 279 - 36X + 64 = 80 - 36X = 80 - 279 - 64 - 36X = - 263 X = 7.30 ........................................ 2) 443 - 19X + 140 = 241 583 - 19X = 241 19X = 342 X = 18
