Bonjour vous pouvais m aider pour le 10 page 107 et le 13 page 107

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10)

2x = 7

x = 7/2

- 8x = 15

x = - 15/8

1,4x = 16

x = 16/1,4

x/7 = 6

x = 42

x/13 = - 5

x = - 65

x/- 4 = 3

- x = 12

x = - 12

13)

5x + 1 = 16

5x = 16 - 1

5x = 15

x = 15/5

x = 3

2x - 9 = 17

2x = 17 + 9

2x = 26

x = 26/2

x = 13.