bonjour
on a 2 triangles rectangles
a) aire ABM = 3 x / 2
b ) aire CMD = 5 ( 10 - x ) = 50 - 5 x
c) 3 x /2 = 50 - 5 x
1.5 x + 5 x = 50
6.5 x= 50
x = ≅ 7.69 cm
