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Exercice 2
Résoudre ces équations:
• 19 = 23-3x
.45+12x=8x-33
14x-8=5+9x
15x=8-17x
Svp !!


Répondre :

19 = 23-3x

3 x = 23 - 19

3 x =  4

x = 4/3

.45+12x=8x-33

12 x - 8 x = - 33 - 45

4 x = - 78

x = 19.5

14x-8=5+9x

14 x - 9 x = 5 + 8

5 x = 13

x = 13/5

15x=8-17x

15 x + 17 x = 8

32 x = 8

x = 8/32 = 1 /4