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Sagot :

VINS

bonjour

a - 2 = - 3 a + 10

a + 3 a = 10 + 2

4 a = 12

a = 12/4 = 3

3 a + 4 = 5 a - 3

3 a - 5 a = - 3 -  4

- 2 a = -  7

a =  7/2 = 3.5

Explications étape par étape

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