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Sagot :

Bonjour

Résoudre ces équations :

3x+7=19

3x = 19 - 7

3x = 12

x = 12/3

x = 4

3/2x +3=4

3/2x = 4 - 3

3/2x = 1

3/2x = 2/2

3x = 2

x = 2/3

x/3 -1 = 2x-3  → Je ne sais pas où est le trait de fraction...

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5

bonjour

3x + 7 = 19

3 x = 12

x = 12/3 = 4

3/2 x + 3 = 4

3/2 x = 4-3

3/2 x = 1

3x = 2

x = 2/3

x/3 - 1 = 2x - 3

x / 3 - 2x = -3 + 1

x -6x / 3 = - 2

-5x / 3 = -2

-5x = -6

x = 6/5

ce que j'ai compris

Bonne journée

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