Question

suma a doya numere este 33,iar difernta lor e 15.Care sunt numerele?​

Answer 1

a |-----|+15
|b |-----| } 33.
33 - 15 = 18 ( 2 partie egale)
18 : 2 = 9 (b)
9 + 15 = 24 (a
Proba: 24 + 9 = 33 ( suma)
24 - 9 = 15 ( diferenta).

Answer 2

Salut!

Voi nota cele doua numere cu x si y.

$\left \{ {{x+y=33} \atop {x-y=15}} \right. = \left \{ {{x+y=33} \atop {x=15+y}} \right. = \left \{ {{15+y+y=33} \atop {x=15+y}} \right. = \left \{ {{2y=18} \atop {x=15+y}} \right. = \left \{ {{y=9} \atop {x=15+y}} \right. = \left \{ {{y=9} \atop {x=24}} \right.$

⇒ S = {(24; 9)}

-Luke48