bonjour
AM = x
Périmètre carré = 4 x
Périmètre triangle = 3 ( 8.4 - x ) = - 3 x + 25.2
4 x = - 3 x + 25.2
4 x + 3 x = 25.2
7 x = 25.2
x = 3.6
AM = 3.6 cm
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bonjour
AM = x
Périmètre carré = 4 x
Périmètre triangle = 3 ( 8.4 - x ) = - 3 x + 25.2
4 x = - 3 x + 25.2
4 x + 3 x = 25.2
7 x = 25.2
x = 3.6
AM = 3.6 cm