Question

Suma a petru numere este 5. Stiind ca ele sunt invers proportionale cu numerele 1/2; 1/3; 0,4; 0,2, aflati numerele.

Answer 1

a+b+c+d=5
$\frac{a}{2}= \frac{b}{3}= \frac{2c}{5}= \frac{d}{5}$|.$\frac{1}{2}$
$\frac{a}{4}= \frac{b}{6} = \frac{c}{5}= \frac{d}{10}= \frac{5}{25}= \frac{1}{5}$
$a= \frac{4}{5} \\ b= \frac{6}{5} \\ c=1 \\ d=2$