Question

Daca $\frac{2x}{3y} = \frac{1}{2}$ , calculeaza: 
 
  a)$\frac{x}{y}$
   b)$\frac{2x-y}{x+y}$

Answer 1

a. 3y=4x⇒y=4x/3;
⇒a. x/y=x/4x/3=x·3/4x⇒se reduce xu cu x⇒3/4;⇒x/y=3/4;
b. 2x-4x/3/x+4x/3
⇒6x/3-4x/3/3x/3+4x/3
⇒2x/3/7x/3⇒se reduce x cu x;
⇒2/3·3/7=2/7;