Solutions des énigmes

x y
(x+y= 8
x= 10
y=−2
x y
(8x+ 8y= 1
10x= 1 ⇒8y= 1 −8x= 1 −8
10 =1 5
40y= 1 40
10

18 ×1
2= 9
18 ×1
3= 6
18 ×1
9= 2
9 + 6 + 2 = 17

x0v0
x1v1
xR
xR0
tx
∆t
v0v1
x1−xR
v1
−xR−x0
v0
= 0