Exercice 1 : Résoudre ces équations. X - 5 = 3 X + 8 = - 12 4x = 36 X: 8 = 15 5x – 3 = 12 4 + 5x = 8 3x + 1 = 19 -3 + 5x = 12 2x 7 - x = 3x-3 x2=16
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Question
Exercice 1 : Résoudre ces équations.
X - 5 = 3
X + 8 = - 12
4x = 36
X: 8 = 15
5x – 3 = 12
4 + 5x = 8
3x + 1 = 19
-3 + 5x = 12
2x 7 - x = 3x-3
x2=16
X - 5 = 3
X + 8 = - 12
4x = 36
X: 8 = 15
5x – 3 = 12
4 + 5x = 8
3x + 1 = 19
-3 + 5x = 12
2x 7 - x = 3x-3
x2=16
1 Réponse
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1. Réponse lucie24062007
Réponse:
x-5 = 3
x = -2
x+8 = -12
x = -4
4x = 36
x = 9
5x -3 = 12
5x = 9
4 + 5x = 8
5x = 4
x = 4:5
3x +1 = 19
3x = 18
x = 6
-3 + 5x = 12
5x = 15
x = 3
2x 7 -x = 3x -3
2×7 = 4x -3
7 = 2x -3
4 = 2x
4 = x
2x = 16
x = 8