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Sagot :

a.

x=4

4×3=12

12+5=17

17×2=34

b.

x=1,5

1,5×3

4,5+5=9,5

9,5×2=19

c.

(x×3+5)×2=(3x+5)×2=6x+10

d.

x=7/2

6×7/2+10=(3×2×7)/2+10=21+10=31

x=0

6×0+10=10

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