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Sagot :

LOULAKAR

bonjour

Résoudre les équations :

3x + 4 = 40

3x = 40 - 4

x = 36/3

[tex]\bf{x = 12}[/tex]

6x + 7 = 19 + 3x

6x - 3x = 19 - 7

3x = 12

x = 12/3

[tex]\bf{x = 4}[/tex]

10x - 5 = 30

10x = 30 + 5

x = 35/10

[tex]\bf{x = 3,5}[/tex]

4x + 19 = 100 - 5x

4x + 5x = 100 - 19

9x = 81

x = 81/9

[tex]\bf{x = 9}[/tex]

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