Question

Stiind ca
$\frac{x}{y} = \frac{2}{3}$
Calculați
$\frac{5x}{y}$
Si
$\frac{2x + y}{x - y}$
​

Answer 1

Răspuns:

x/y=2/3=>3x=2y

5x/y=5·2/3=10/3=3,(3)

y=3x/2

(2x+y)/(x-y)=(2x+y)/(x-y)= 2x +3x/2)/x-3x/2) = (7x/2)/(- x/2)=-7