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Sagot :

Bonsoir,

1)

PA

7

7*7 = 49

49+ 4 = 53

PB

7

21

29

2)

PA

x

7x

7x+4

PB

x

3x

3x+8

3)

7x+4 = 3x+8

4)

7x+4 = 3x+8

7x-3x = 8 -4

4x = 4

x= 4/4

 x = 1

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