Question

In bradutul de Craciun straluceau 125 de globute. Globulete rosii si galbene erau 89, iar galbene si albe 75 .
Cate globulete din fiecare straluceau in bradut ?

Answer 1

R+G+A = 125
R+G= 89 => A= 125-89 = 36 globulete albe
G+A= 75 => R= 125-75 = 50 globulete rosii
50+G+36=125 =. G= 39 globulete galbene

Answer 2

r+g+a=125;
r+g=89;
g+a=75;
⇒a=125-89
⇒a=36[globulete albe];
⇒g=75-36
⇒g=39[globulete galbene];
⇒r=89-39
⇒r=50[globulete rosii];