Question

a+b + =31,5
a=b ori 8
a,b =?

Answer 1

a= 8b
a+b= 31.5
8b+b=31.5
9b=31.5
b= 3.5
a= 8 * 3.5 = 28

Answer 2

$a+b=31,5$
$a=8b$
$8b+b=31,5$
$9b=31,5$
$b=31,5:9$
$b=3,5$
$a=8*3,5$
$a=28$
$Raspuns:a=28;b=3,5.$