Réponse :
ex6
A 7x + 17 = 9x +29
A 7x - 9x = 29 -17
A -2x = 12
A -x = 12/2
A x = -6
B 4x + 15 = 7x + 24
B 4x -7x = 24 - 15
B -3x = 9
B -x = 9/3
B x = -3
C 8x + 26 = 5x +14
C 8x - 5x = 14 - 26
C 3x = -12
C x = -12/3
C x = -4
D 23x + 31 = 16x + 17
D 23x - 16x = 17 - 31
D 7x = -14
D x = -14/7
D x = -2
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Réponse :
ex6
A 7x + 17 = 9x +29
A 7x - 9x = 29 -17
A -2x = 12
A -x = 12/2
A x = -6
B 4x + 15 = 7x + 24
B 4x -7x = 24 - 15
B -3x = 9
B -x = 9/3
B x = -3
C 8x + 26 = 5x +14
C 8x - 5x = 14 - 26
C 3x = -12
C x = -12/3
C x = -4
D 23x + 31 = 16x + 17
D 23x - 16x = 17 - 31
D 7x = -14
D x = -14/7
D x = -2
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