Răspunsuri

2014-05-02T11:11:46+03:00
A+b= \frac{10}{9}
a-b= \frac{3}{9} =>a=3/9+b
3/9+b+b=10/9=> 2b=7/9=> b=7/9*1/2=7/18
a=3/9+7/18=6/18+7/18=13/18
2014-05-02T11:11:57+03:00
A+b=10/9
a-b=3/9    prin adunarea celor 2 ecuatii obtinem
2a/=13/9
a=13/9/2
a=13/9 *1/2
a=13/18

13/18 +b=10/9  aducem la acelasi numitor
13+18b=20
18b=7
b=7/18