Réponses

2012-11-18T16:42:01+01:00

2x+3=4x-2

2x+3-3=4x-2-3

2x-4x=4x-2-3-4x

-2x=-5

x=-5/-2

x=5/2

x=2.5

2012-11-18T16:42:13+01:00