Réponses

2013-05-19T14:38:21+02:00

6a+3(a-5)-(a+3)=4(a-2)

6a + 3a - 15 - a - 3 = 4a - 8

8a - 18 = 4a - 8

4a = 10

a = 2,5

2013-05-19T14:54:53+02:00

 

6a+3(a-5)-(a+3)=4(a-2)

6a +3a-15-a-3=4a-8

8a-18=4a-8

4a=10

a=2,5