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Explications étape par étape

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Exercice 24 :

Developer :

13 + (x - 6) = 13 + x - 6 = x + 7

-5 - (4 - 2x) = -5 - 4 + 2x = 2x - 9

10 - (x + 3) + (-3x + 6) = 10 - x - 3 - 3x + 6 = -4x + 13

(5 + 2x) - (-7 - 7x) = 5 + 2x + 7 + 7x = 9x + 12

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

Hello !

a) 13 + (x-6) = 13 + x - 6 = x + 13 - 6 =x + 7

b) -5 - (4-2x) = -5 - 4 + 2x = 2x - 9

c) 10 - (x+3) + (-3x+6) = 10-x-3 - 3x+6 = -4x + 13

d) (5+2x) - (-7-7x) = 5+2x+7+7x = 9x + 12

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

Bonne soirée !