Ответы и объяснения

  • uyrasik
  • почетный грамотей
2013-04-11T17:08:02+00:00

5/6 х + 8 = 1/4х - 6

5/6х - 1/4х = -8 -6

5/6х - 1/4х = 10/12х - 3/12х = 7/12х

7/12х = -14

х = -14 : 7/12 

х = -24

 

2/3 ( 4 1/2х - 3/5) - 5/7 ( 7/15х - 7/9) = 1 32/45

 

3х - 2/5 - 1/3х + 5/9 = 1 32/45

2 2/3х = 1 32/45 + 2/5 - 5/9

2 2/3 х = 2 1/9 - 5/9

2 2/3х = 1 5/9

х = 1 5/9 : 2 2/3

х = 7/12