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Cel mai inteligent răspuns!
2014-06-01T17:26:09+03:00
Notez numerele cu x si y.
x+y=72
x=7y
7y+y=72
8y=72
y=9=>x=7 x9=63
1 5 1
  • Utilizator Brainly
2014-06-01T17:26:26+03:00
A+b=72
a=7b

7b+b=72
8b=72
b=72:8
b=9

a=7x9
a=63

Verificare : 63+9=72
1 5 1