Réponses

2013-01-05T14:08:44+01:00

L = (6x+12.3) -5 +7,5 - 3x

= 6x +12.3 -5 +7.5 -3x

= 3x +14.8

 

M = 5x -10 -2.2 -4x -x

=  -12.2

 

N = 7.2-y-4.3+4y+ 2.2

= 3y + 5.1

2013-01-05T14:28:07+01:00

L = (6x+12.3) -5 +7,5 - 3x = 6x +12.3 -5 +7.5 -3x = 3x +14.8

 

M = 5x -10 -2.2 -4x -x =  -12.2

 

N = 7.2-y-4.3+4y+ 2.2 = 3y + 5.1

 

voilà, bon courage !!