Sagot :
Réponse :
Explications étape par étape :
1.
a) x+5=25 b) 6+y=-5 c) -6+a=7 d)t-12=-7
x=25-5 y=-5-6 a=7+6 t=-7+12
x=20 y=-11 a=13 t=3
2.
a) 3x=27 b)6y=-54
x=27/3 y=-54*6
x=9 y=-324
3.
a) 3x+7=34 b) 2+4y=-6 c)-3-2a=7 d)-3=-3t-12
3x=34-7 4y=-6-2 -2a=7+3 12-3=3t
3x=27 4y=-8 -2a=10 9=3t
x=27/3 y=8/4 a=10/-2 t=3/9
x=9 y=2 a=-5
Voilaa pour toi
Réponse:
a) x = 25 - 5 = 20
b) y = 5 - 6 = - 1
c) a = 7 + 6 = 13
d) t = 7 + 12 = 19
2
a) x = 27/ 3 = 9
b) y = 54/6 = 9
3
a) 3x = 34 - 7
3x = 27
x = 27/3
x = 9
b) 4y = - 6 - 2
4y = - 8
y = -8/4
y = - 2
c) - 2a = 7 + 3
- 2a = 10
a = 10/-2
a = - 5
d) - 3t - 12 = -3
- 3t = - 3 + 12
- 3t = 9
t = 9/-3
t = - 3