Răspuns :
a |-----------|-----| |
27 |
| 57
b |-----------| |
57-27=30 (2 segmente)
30:2=15 (b)
15+27=42 (a)
Sper ca te-am ajutat!
Avem doua numere,notate cu a si b.
a+b=57
a-b=27 => a=27+b
=> 27 + b+ b=57
27+2 x b=57
2 x b=57-27
2 x b=30 | :2
b=15
a+b=57 => a+ 15 =57=> a=57-15=42
=> a=42; b=15
a+b=57
a-b=27 => a=27+b
=> 27 + b+ b=57
27+2 x b=57
2 x b=57-27
2 x b=30 | :2
b=15
a+b=57 => a+ 15 =57=> a=57-15=42
=> a=42; b=15