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2013-05-21T13:03:37+02:00

3x  -1   = 2 -x

5    15         3

 

9x -1 = 30 -5x

15 15  15   15

9x -1 = 30 -5x

9x +5x = +1 +30

14x = 31

x = 31/14

2013-05-21T13:30:05+02:00

3x/5 - 1/15 = 2- x/3

3/5x + 1/3x = 2 +1/15

9/15x +5/15x = 30/15 +/15

14/15x = 31/15

x= 31/15*15/14

x= 31/14