Răspunsuri

2014-10-28T18:26:22+02:00
A+b=27
 \frac{4}{5}  
a. \frac{4}{5} a=27
2a=27: \frac{4}{5}
2a= \frac{27}{1}. \frac{5}{4}
2a=33,75
a=16,875⇒b=27-a
b=10,125
Sper ca e bine :)