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Sagot :

Bonjour

a. 13 + x - 6 = x + 7

b. - 5 - 4 + 2x = 2x - 9

c. 10 - x - 3 - 3x + 6 = - x - 3x + 10 + 6 - 3 = - 4x + 13

d. 5 + 2x + 7 + 7x = 2x + 7x + 5 + 7 = 9x + 12

e. x - 8 - (2 + 4x - 9 + 5x) = x - 8 - 2 - 4x + 9 - 5x = x - 4x - 5x - 8 - 2 + 9 = - 8x - 1.

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