Question

Suma a doua numere este 12/15.Afla numerele stiind ca primul nr. este de doua ori mai mare decat al doilea .

Answer 1

a |__|__|
b |__| } 12/15

1+2=3 (segmente egale)

12/15:3=4/15 ( b )

4/15×2=8/15 ( a )

V:8/15+4/15=12/15 ✔

Answer 2

a+b=12/15
a=2b
2b+b=12/15
3b=12/15 , de unde 45b=12 , de unde b=12/45=4/15
a=2x12/45
a=24/45=8/15