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Sagot :

Explications étape par étape:

b. x - y = 1. y = 2

c y = x + 5. y = 2

d. x = 1/2 = 0,5. y = 1/2 = 0,5

e 2 ( y - 2x ) = 6. 3y - 7x = 8

f x = - 26/3.= - 8 2/3. y = - 13/3 = - 4 1/3

g. 2x + 3y = 0. 3x + 2y = 0

h. 4x - 3y = 1. 12x - y = - 5

i. 2x - 3y = 1. 2y - 3x = 1

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