Question

Aflați cele doua numere care au media aritmetică 15 si raportul 2 pe 3.

Answer 1

a/b=2/3
3a=2b
a=2k
b=3k
(a+b):2=15
(2k+3k):2=15
5k=15*2
5k=30
k=30:5
k=6
a=2*6=12
b=3*6=18

Answer 2

ma=(a+b)/2=15
a+b=30
a/b=2/3
a/(a+b)=2/(3+2)
a/30=2/5
a=30x2/5=12
b=30-12=18