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Exercice maison : Résoudre les équations suivantes : (E): 2x = -4 (F): 3x +2 = 11 (G): 7x - 25 = 2x (H): 5x + 45 = 0 0:2x + 7 = - 4x - 23 - - (J) : -3x +3 = 2x + 3 =

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Sagot :

Bonsoir,

(E): 2x = -4

x= -4/2 = -2

(F): 3x +2 = 11

3x = 11-2

3x = 9

x= 9/3 = 3

(G): 7x - 25 = 2x

7x-2x =25

5x = 25

x= 25/5 = 5

(H): 5x + 45 = 0

5x= -45

x= -45/5 = -9

2x + 7 = - 4x - 23

2x+4x =  -23 -7

6x = -30

x= -30/6 = -5

- (J) : -3x +3 = 2x + 3 =

3-3 = 2x+3x

0 = 5x

x=0