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Sagot :

Réponse:

6. a. 12/15=x/40 ~ 15x=480 ~ x=32

7. a. 4,8d=14.4 ~ d=3

b. 2,4e=27.69 ~ e=11,53

c. 0,3f=3,42 ~ f=11,4

8. 412/150=23/x ~ 412x=3450 ~ x=8,38l

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