Bonjour pouvez vous m'aider svp merci :
Trouvez x
a) -2 -5 (-6 + -3x / -5) = -4x + (-6x+2)
b) 2/5 = 9 / 8 + x
c) 7 + (5/4)x = 3/2
Merci de votre aide
Trouvez x
a) -2 -5 (-6 + -3x / -5) = -4x + (-6x+2)
b) 2/5 = 9 / 8 + x
c) 7 + (5/4)x = 3/2
Merci de votre aide
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Bonjour,
a) -2 -5 (-6 + -3x / -5) = -4x + (-6x+2)
- 2 + 30 - 15x/5 = - 4x - 6x + 2
- 2 + 30 - 3x = - 4x - 6x + 2
- 3x + 4x + 6x = 2 + 2 - 30
7x = - 26
x = - 26/7
b) 2/5 = 9 / 8 + x
- x = 9/8 - 2/5
- 40/40x = - 45/40 - 16/40
- 40x = - 29
x = 29/40
c) 7 + (5/4)x = 3/2
5/4x = 3/2 - 7
5/4x = 6/4 - 28/4
5x = 6 - 28
5x = - 22
x = - 22/5