Résoudre les équations suivantes: 1) x + 8 = 6 2) 5 - y = -13 3) -2z = -8 4) 3z - 10= 11 5) 7x + 2 = 7 - 3x 6) 3 ( x- 2) = - ( x + 5) Merci d'avance

Bonjour,

x + 8 = 6

x = 6 - 8

x = -2

5 - y = -13

- y = - 13 - 5

- y = -18

y = 18

-2z = -8

z = -8/-2 = 8/2 = 4

3z - 10 = 11

3z = 11 + 10

3z = 21

z = 21/3 = 7

7x + 3x = 7 - 2

10x = 5

x = 5/10 = 1/2

3x - 6 = - x - 5

3x + x = - 5 + 6

4x = 1

x = 1/4

bonjour

x+ 8 = 6

x = 6 - 8

x = - 2

5 - y = - 13

- y = - 13 - 5

- y = - 18

y = 18

- 2 z = - 8

z = 4

3 z - 10 = 11

3 z = 11 + 10

3 z = 21

z = 7

7 x + 2 = 7 - 3 x

7 x + 3 x = 7 - 2

10 x =  5

x =  5/10 = 1 /2

3 x - 6 = - x - 5

3 x + x = - 5 + 6

4 x =  1

x = 1 /4