Réponse :
Explications étape par étape
Bonsoir
11 = 7y - 2
11 + 2 = 7y - 2 + 2
13 = 7y
13/7 = 7y/7
y = 13/7
-3 = 6z - 13
-3 + 13 = 6z - 13 + 13
10 = 6z
10/6 = 6z/6
(2 x 5)/(2 x 3) = z
z = 5/3
t/4 + 15 = 8
t/4 + 15 - 15 = 8 - 15
t/4 = -7
4t/4 = -7 * 4
t = -28
3y + 4 = 9
3y + 4 - 4 = 9 - 4
3y = 5
3y/3 = 5/3
y = 5/3
12 = 3/2 w + 14
12 - 14 = 3/2 w + 14 - 14
-2 = 3/2 w
-2 * 2/3 = 3/2 w * 2/3
w = -4/3
