Question

Media aritmetica a doua numere este 42 .Aflati numerele ,stiind ca un numar reprezinta 2 supra 5.

Answer 1

a+b/2=42
a+b=84
a=2b/5
2b/5+b=84
2b/5+5b/5=420/5
2b+5b=420
7b=420
b=60
a=84-60
a=24

Answer 2

a=$\frac{2}{5}$
ma=42

$\frac{a+b}{2} =42$
$\frac{ \frac{2}{5}+b }{2}$=42
$\frac{2}{5} +b=42*2 \\ \frac{2}{5} +b=84 \\ b=84- \frac{2}{5} \\ b= \frac{418}{5}$