Question

sa se imparta numarul 27 in doua parti invers proportionale cu 12 si 15

Answer 1

{a,b} i.p. {12,15}
a+b=27
a×12=b×15
$a = \frac{b \times 15}{12}$
$\frac{b \times 15}{12} + b = 27$
Inmultim relatia cu 12
$b \times 15 + 12b = 324$
$27b = 324$
$b = 12$
$= > a = 27 - 12 \\ a = 15$