Réponses

2012-11-05T13:49:11+01:00

7x/3 -2 = 5x/6 +1

7x/3-5x/6=1+2

14x/6-5x/6=3

9x/3=2

3x=2

x=2/3

 

4+3x/5  = 7x-1/8

3x/5-7x=-4-1/8

3x/5-35x/5=-32/8-1/8

-32x/5=-33/8

x=33/8*5/32=165/256

Meilleure réponse !
2012-11-05T13:50:33+01:00

1)7x/3-5x/6=2+1

   3/2x=3 

   x=3/3/2

   x=2

 

2)3x/5-7x=-4-1/8

-32/5x=-33/8

x=-33/8/-32/5=165/256