Răspunsuri

2014-05-14T20:03:53+03:00
A= 3b/5

7*3b/5 -3b=36
21b/5 -3b=36  aducem la acelasi numitor
21b- 15b=180
6b=180
b=30
a=3*6=18
1 5 1
2014-05-14T20:16:51+03:00
A/3=b/5=k
a/3=k⇒a=3k
b/5=k⇒b=5k
7·3k-3·5k=36
21k-15k=36
6k=36
k=6
a=3·6⇒18
b=5·6⇒30