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Sagot :

Réponse :

Explications étape par étape

Bjr,

exercice 1

a) 8x = -3

x = -3/8

b) 2x=9

x= 9/2

c) 49= 7x

x= 49/7 = 7

d) -6x=5

x= -5/6

e) 5x = 3-12

5x = -9

x= -9/5

f) 10x = -7-1

x= -8/10 = -4/5

g) 9x = 6+2

x= 8/9

h) 20+4 = 4x

24=4x

24/4=x

x= 6

Exercice 2

a) 2x+2x = 8

4x= 8

x=8/4 = 2

b) -8-4 = 7x -4x

-12 = 3x

-12/3 = x

x = -4

c) 5+9 = 6x-3x

14 = 3x

x= 3/14

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