Partie 2 : des équations à réduire
a) 3x - 4-8 b)-5x+7-0 c)-2x 10 - 3x
e) 3x - 8 = 5x + 20
f) 3x + 4 - 2x + 9
h) -5x - 1 - - 2x + 4 1) 3x + 1 - 7x + 5
k) -5x - 7+ 2x - 8 + 11x = 4 + 6x + 1 - 9x + 3x - 3
d) 2x = 1 - 6x
B) - 2x + 3 = 3x - 5
1) 5x + 2 = 9x + 7


J’aurais besoin d’aide merci d’avance


Sagot :

Bonjour

Réduire les équations :

a) 3x - 4-8  = 3x - 12

b)-5x+7-0 = - 5x + 7

c)-2x 10 - 3x = erreur manque un signe

e) 3x - 8 = 5x + 20

3x - 5x = 20 + 8

- 2x = 28

x = - 28/2

x = - 14

f) 3x + 4 - 2x + 9 = x + 13

h) -5x - 1 - - 2x + 4 = - 5x - 1 + 2x + 4 = - 3x + 3

1) 3x + 1 - 7x + 5 = - 4x + 6

k) -5x - 7+ 2x - 8 + 11x = 4 + 6x + 1 - 9x + 3x - 3

- 5x + 2x + 11x - 6x + 9x - 3x = 4 + 1 - 3 + 7 + 8

8x = 17

x = 17/8

d) 2x = 1 - 6x

2x + 6x = 1

8x = 1

x = 1/8

B) - 2x + 3 = 3x - 5

- 2x - 3x = - 5 - 3

- 5x = - 8

x = 8/5

1) 5x + 2 = 9x + 7

5x - 9x = 7 - 2

- 4x = 5

x = - 5/4.