Răspuns:
a=8
b=12
Explicație pas cu pas:
a+b=20
[tex] \frac{a}{b} = \frac{2}{3} [/tex]
-------------------------|------
a=?
b=?
--------------------------|---|-----
[tex] \frac{a}{b} = \frac{2}{3} = k \: = >[/tex]
{. a=2k
b=3k
a+b=20
2k + 3k = 20
5k =20
k = 20:5
k= 4
a= 2k= 2 × 4= 8
b= 3k = 3 × 4=12
