Răspunsuri

2014-07-24T14:14:38+03:00
5(7a+3b)=8(5a+b)
35a+15b=40a+8b
5a=7b
a/b=7/5
3 4 3
Cel mai inteligent răspuns!
2014-07-24T14:16:27+03:00
Face produsul mezilor = produsul extremilor

5(7a+3b)=8(5a+b)
35a+15b=40a+8b
15b-8b=40a-35 a
7b=5a

 \frac{a}{b} = \frac{7}{5}
3 5 3