1
z – y = A – B
2
y =
z =


3
z –
= A – B
– y = A – B


4
(n – m)z = A – By = [bricht ab]
5
z =
|

6
70r n : m = z : yy =

7
m : n = y : zz =

8
z – y = z –
= A – B

9
(n – m)z = A – B
10
z =

11
z:y
12
n : m =
:


13
z =
x =
=



14
y =
x =


15
A –
[bricht ab]

16