20 . P = 96
L = l + 8
__________
L = ? , l = ?
1) 96 - 8 x 2 = 80 ( 4 p . e )
2) 80 : 4 = 20 ( o p . e . adica o l )
3) 20 + 8 = 28 ( o L )
21. a + e = 86
a - 8
→ a = e x 3
e + 6
________
a = ? , e = ?
a |--|--|--|
→ 84
e |--|
1) 84:4=21
2)21 x 3=63
3)63+8=71(a)
4)21-6=15(e)
