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Sagot :

Bonjour,

1) 5 × 3 = 15

15 + 10 = 25

25 × 2 = 50

2) 1,5 × 3 = 4,5

4,5 × 10 = 45

45 × 2 = 90

12 × 3 = 36

36 × 10 = 360

360 × 2 = 720

3) (x × 3 + 10) × 2

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