Sagot :
voici les réponses .
5x-7= 3x+9 7-(3+x)=5x 2(5-3x) =7 6(4-5x) = 5(10+4x)
5x-3x=9+7 7-3-x =5x 10-6x = 7 24-30x = 50+20x
2x=16 4-x =5x 10-7 =6x -30x-20x = 50-24
x=16/2 4 =6x 3 = 6x -50x = 26
x=8 x = 4/6 x = 3/6 x = -26/50
x = -13/25
bonjour!
Résoudre les équations suivantes:
a) 5x-7=-3x+9.
b) 7-(3+x)=-5x.
c) 2(5-3x)=7.
d) 6(4-5x)=-5(10+4x).
merci d'avance.
voici les réponses .
5x-7= 3x+9 7-(3+x)=5x 2(5-3x) =7 6(4-5x) = 5(10+4x)
5x-3x=9+7 7-3-x =5x 10-6x = 7 24-30x = 50+20x
2x=16 4-x =5x 10-7 =6x -30x-20x = 50-24
x=16/2 4 =6x 3 = 6x -50x = 26
x=8 x = 4/6 x = 3/6 x = -26/50
x = -13/25