Question

stiind $\frac{2a}{9b}$ = $\frac{1}{5 }$ aflati valoarea raportului: $\frac{2a-b}{ 3a+b}$

Answer 1

2a/9b=1/5 I·9/2⇔a/b=9/10⇔a/9=b/10  ⇒a=9k,b=10k
(2a-b)/(3a+b)=(18k-10k)/(27k+10k)=8k/37k=8/37