Résoudre les équations suivantes : A= 2x + 5 = 7x – 10 B= - 4x + 6 = -12x – 18 C= 7x – 3 + 12 – 15x = x – 7 -11x D= 4+2(4x-3)=7+3(x-8) E=3-4(2x-7)=-2(7x-3)-10​

Réponse :

Bonjour

Explications étape par étape

A = 2x +5 = 7x -10

A = 2x -7x = -5 -10

A = -5x = -15

A = x = +15/5 = 3

- 4x + 6 = -12x – 18

-4x +12x = -6 -18

+8x = -24

x = -24/8 = -12/4 = -3

7x – 3 + 12 – 15x = x – 7 -11x

7x -15x +11x -x = +3 -12 -7

2x = -16

x = -16/2 x= -8

4+2 (4x-3 )= 7+3(x-8)

4 +8x -6 = 7 +3x -24

+8x -3x = -4 +6 +7 -24

5x = -15

x = -15/3

X = -5

3-4 (2x-7) =-2 (7x-3) -10​

3 -8x +28 = -14x +6 -10

-8x +14x = -3 -28 +6 -10

+6x = -41 +6

6x = -35

x = -35/6