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Sagot :

Bonjour,

x + 4 = 1

x = 1 - 4

x = -3

x - 2 = - 1

x = - 1 + 2

x = 1

-5x = 4

x = -4/5

-4 * 2 = -8

-8 + 3 = -5

5 * 2 = 10

10 + 3 = 13

x * 2 = 2x

2x + 3

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