Question

Știind ca a/b = 3/5 , Calculați valoarea raportului 4a-b/3a+2b

Answer 1

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

Inlocuim a in raport

$\frac{4 \frac{3b}{5} -b}{3 \frac{3b}{5}+2b } = \frac{12b-5b}{5} \frac{5}{9b+10b} = \frac{7b}{5} \frac{5}{19b} = \frac{7}{19}$