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Sagot :

Bonsoir

M = - 1/2 + 7/4 x 5/9

M = -1/2 + 35/36

M = (- 1 x 18) / (18 x 2) + 35/36

M = - 18/36 + 35/36

M = 17/36

N = - 5/3 x (- 4/7 - - 9/28)

N = - 5/3 x [(- 4 x 4) / (7 x 4) + 9/18]

N = - 5/3 x (- 16/28 + 9/28)

N = - 5/3 x (- 6/28)

N = 30/84

N = (6 x 5) / (6 x 14)

N = 5/14

P= (2/7 - 3/14) x (- 5/6 - 2/9)

P = [(2 x 2) / (7 x 2) - 3/14] x [(- 5 x 3) / (6 x 3) - (2 x 2) / (9 x 2)]

P = (4/14 - 3/14) x (- 15/18 - 4/18)

P = 1/14 x - 19/18

P = - 19/252

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