Réponse :
Explications étape par étape
Bonjour,
A)
-23+2 = 9x -2x
-21 = 7x
x= -21/7 = -3
B)
-5t + 12t = 10 -3
7t =7
t =7/7 = 1
C)
13 -22= 7x -4x
- 9 = 3x
x= -9/3 = -3
D)
-3a -1 = 2a +14
-1-14 = 2a +3a
-15 = 5a
a = -15/5 = -3
Victor a raison
A= 2x - 23 = 9x - 2
2x - 9x = -2 + 23
-7x = 21
x= 21 / -7
x= - 3
B= 3 - 5t = 10 - 12t
-5t + 12t = 10 - 3
7t = 7
t = 1
C= 4x + 13 = 22 + 7x
4x - 7x = 22 - 13
- 3x = 9
x= 9/ -3
x= -3
D= -3a - 1 = 2(a + 7)
-3a - 1 = 2a + 14
-3a - 2a = 14 + 1
-5a = 15
a= 15 / -5
a= -3
Donc, cette affirmation est vraie.
En espérant t'avoir aidé,
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Verified answer
Réponse :
Explications étape par étape
Bonjour,
A)
-23+2 = 9x -2x
-21 = 7x
x= -21/7 = -3
B)
-5t + 12t = 10 -3
7t =7
t =7/7 = 1
C)
13 -22= 7x -4x
- 9 = 3x
x= -9/3 = -3
D)
-3a -1 = 2a +14
-1-14 = 2a +3a
-15 = 5a
a = -15/5 = -3
Victor a raison
Verified answer
Bonjour,
A= 2x - 23 = 9x - 2
2x - 9x = -2 + 23
-7x = 21
x= 21 / -7
x= - 3
B= 3 - 5t = 10 - 12t
-5t + 12t = 10 - 3
7t = 7
t = 1
C= 4x + 13 = 22 + 7x
4x - 7x = 22 - 13
- 3x = 9
x= 9/ -3
x= -3
D= -3a - 1 = 2(a + 7)
-3a - 1 = 2a + 14
-3a - 2a = 14 + 1
-5a = 15
a= 15 / -5
a= -3
Donc, cette affirmation est vraie.
En espérant t'avoir aidé,