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