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Sagot :

A = 2x + 5(8-x) = 2x + 40 -5x = -3x +40

B = (2x+5)+8-x = 2x + 5 + 8 - x = x +13

C = (2x + 5)(8-x) = 16x -2x²+40-5x = -2x² +11x + 40

D = (2x +5) * 8 -x = 16x +40 - x = 15x +40

E = (2x-5)-(8-x) = 2x -5 -8 +x = 3x -13

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