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Sagot :

CHRISCHROLLS

Réponse :

a)  2x - 8 = 3

2x = 3 + 8

2x = 11

x = 11/2

b) 5x - 12 = 20

5x = 32

x = 32/5

c) 4x + 10 = 2x

4x - 2x = -10

2x = -10

x = -10/2 = -5

d) 8x +10 = 2x -15

8x - 2x = -15 - 10

6x = -25

x = -25/6

e) 8(5+x) = 100

40 + 8x = 100

x = 60/8 = 15/2

Explications étape par étape

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