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Pour les exercices 43 à 45, résoudre chaque
équation.
a. 5x + 7 = 2x - 2

b. 3x + 2 = r - 10

C. 21 - 5 = 5x + 1

D. 3 - 7x = 3x + 2

E. 5r-6= -x +3

F .2x-1=1

AIDER MOI SVP MERCI
D'AVANCE
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Répondre :

Hello,

5x + 7 = 2x - 2

5x - 2x = - 2 - 7

3x = -9

x = -9/3 = -3

3x + 2 = x - 10

3x - x = - 10 - 2

2x = -12

x = -12/2 = -6

21 - 5 = 5x + 1

5x + 1 = 16

5x = 16 - 1

5x = 15

x = 15/5 = 3

3 - 7x = 3x + 2

- 7x - 3x = 2 - 3

-10x = -1

x = 1/10

5x - 6 = -x + 3

5x + x = 3 + 6

6x = 9

x = 9/6 = 3/2 = 1.5

2x - 1 = 1

2x = 1 + 1

2x = 2

x = 2/2 = 1

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