Răspunsuri

2014-07-02T14:45:11+03:00
A/b=7/5
a=7b/5

a-b=42

7b/5-b=42  aducem la acelasi numitor

7b-5b=210

2b=210
b=105

a=7*105/5

a=7*21=144
7 3 7