Question

Aflati doua numere,stiind ca ele sunt invers proportionale cu 3 si 5.Iar suma lor este56

Answer 1

(a;b)i.p(3;5)
=>a=k/3
  b=k/5
a+b=56
<=> k/3+k/5=56 |*15
5k+3k=840
8k=840|:8=>k=105
=>a= k/3 =>a=105/3= 35
b=k/5=>b=105/5=21
a=35
b=21