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Sagot :

NBA10

Réponse :

bonjour,

2x= 9

x = 9/2

-8x = 15

x = 15/-8

x/7 = 6

x/7 × 7 = 6×7

x = 42

x/13 = -5

x/13×13 = -5×13

x = -65

0.4x = 16

x = 16/0.4

x = 40

voila:)

ANASAG

Réponse:

a) 2x =9

2x/2 = 9/2

x = 4,5

b) -8x = 15

-8x/-8 = 15/-8

x = -15/8

c) x/7 = 6

x/7 × 7 = 6 × 7

x = 42

d) x/13 = -5

x/13 × 13 = -5 × 13

x = -65

e) 0,4x = 16

0,4x/0,4 = 16/0,4

x = 40

f) Cette expression n'est pas assez clair

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