Răspuns :
a+b=63
a:b=2
a=2b
2b+b=63
3b=63
b=63:3=21
a=2b=2x21=42
42+21=63(verificare)
42:21=2(verificare)
a:b=2
a=2b
2b+b=63
3b=63
b=63:3=21
a=2b=2x21=42
42+21=63(verificare)
42:21=2(verificare)
a + b = 63
a : b = 2
a = 2 x b
2 x b + b = 63
3 x b = 63
b = 63 : 3 a = 2 x 21
b = 21 a = 42
a : b = 2
a = 2 x b
2 x b + b = 63
3 x b = 63
b = 63 : 3 a = 2 x 21
b = 21 a = 42