59 Résous les équations suivantes. a. 3x – 3 = 3 d. 1 + 5x = – 29 b. 5z – 10 = 12 e. 2 + 3z = – 2 c. 3 - y = 0 9- y = – 2,3

Réponse:

a)

3x - 3 = 3

3x = 3+3

3x = 6

x = 6/3

x = 2

d)

1 +5x = -29

5x = -29 - 1

5x = -30

x = -30/5

x = -6

b)

5z - 10 = 12

5z = 12 + 10

5z = 22

z = 22/5

e )

2 +3z = -2

3z = -2 -2

3z = -4

z = -4/3

c )

3 - y = 0

y = 3

x)

9-y = -2,3

9 + 2,3 = y

y = 11,3