Question

Fie numerele a si b invers proportionale cu 4 si 6. Aflati numelere stiind ca a+b=5.

Answer 1

4a=6b⇒a=3b/2
Inlocuim in relatia data

3b/2+b=5 aducem la acelasi numitor

3b+2b=10
5b=10
b=2;  a=3·2/2=2

Answer 2

4a=6b=k => a=4k ; b=6k
a+b=5  => 4k+6k=5 => 10k=5 => k=0.5 => a=2 ; b=3