Question

aflati valoarea raportului:
$\frac{3x + 2y}{5x + y } stiind \: ca \: \frac{y}{x} = 1.3$

Answer 1

y/x=13/10 =>x=10y/13
(3 • 10y/13 + 2y) • 1/(5 • 10y/13 + y) =
(30y+26y)/13 • 1/(50y + 13y)/13 =
56y/13 • 13/63y =
56/63 =
8/9