Réponses

2013-06-09T14:36:57+02:00

3x-7 = 2x-9

3x-2x=7-9

x=-2

 

 32-15x = -18+10x

-15x-10x=-18-32

-25x=-50

x=50/25

x=2

 

1,5x = 3,5x - 10

1.5x-3.5x=-10

-2x=-10

x=10/2

x=5