Найдите Х

1) 4 7 2

3--- - ( х - 1 --- ) = 2 ---

9 9 9

2) 6 7 13

23 --- - ( х + 7 --- ) = 12 ----

19 19 19

1

Ответы и объяснения

  • Участник Знаний
2013-06-20T17:22:45+00:00

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