Réponses

2014-05-02T16:50:20+02:00
A = 5 -2x / 4 = 3x -1
5/4 -2/4x -3x = -1
-2/4x -12/4x = -1 -5/4
 -14/4 x = -4/4 -5/4
 -7/2x = -9/4
 x = -9/4* -2/7
 x =18 /21
 x= 6 /7

b = 2/5 +t = 1/4t+1
t -1/4t = 1 -2/5
4/4t -1/4t = 5/5 -2/5
3/4t = 3/5
t = 3/5 *4/3
t = 5/4

c = 1/4y -3 = 3/2y +1
1/4y -3/2y = 1 +3
1/4y -6/4y =4
5/4y = 4
y = 4*5/4
y = 5

d = 1/3 m +6 = 4/3 -2m
1/3m -2m = 4/3 -6
1/3 m -6/3 m = 4/3 -18/3
5/3 m = 14/3
m = 14/3 * 3/5
m = 90

aline ok pour la c et la d
leonard non car aucun resultat n esgt negatif

Maggy ok  pour a et b