Réponses

  • Utilisateur Brainly
2013-11-18T21:14:30+01:00
: 2 (2-y)= -6
4-2y=-6
-2y=-6-4
-2y=-10
y=(-10)/(-2)
y=5
2013-11-18T21:16:24+01:00
Bonsoir,

2(2-y) = -6

2 * 2 - 2 * y = -6

4 - 2y = -6

-2y = -6 - 4

-2 y = -10

y = -10/(-2)

y = 5

Preuve : 

2(2 - 5) = 2 * (-3) = -6.