a + b + c = 21
a = b : 2
a = c : 4
_________
a = ? ; b = ? ;:c = ?
a |----|
b |----|----| }21
c |----|----|----|----|
1) 1 + 2 + 4 = 7 ( p.e .)
2) 21 ÷ 7 = 3 ( o p.e. ,adica "a" )
3) 3 × 2 = 6 ( b )
4) 3 × 4 = 12 ( c )
V: 3 + 6 + 12 = 21 => A
R : a = 3
b = 6
c = 12
Succes!!!❤❤❤
