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Sagot :

AYUDA

bjr

3x - 3 = 3

les x à gauche - les constantes (nombres) à droite

3x - 3 + 3 = 3 + 3

3x = 6

3x/3 = 6/3

x = 2

5z - 10 = 12

5z - 10 + 10 = 12 + 10

5z = 22

5z/5 = 22/5

z = 4,4

3 - y = 0

3 = y

1 + 5x = -29

5x + 1 - 1 = - 29 - 1

5x = -30

5x/5 = -30/5

x = -6

tu as compris :)

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