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Sagot :

Bonsoir

On note
Pam = x
Pim = x +2
Poum = x + 2 +3
Toto = 2(x+2)
On pose
x + x +2 + 2 +x + 2 +3 + 2x +4 = 31
5x = 31 - 2 -5 -4
5x = 20
x = 4

Pam a 4 ans,  pim 6 ans,  poum 9ans et  toto 12 ans


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