r+g+a=673
r+g=475
g+a=524
Cate sunt de fiecare fel?
Rezolvare
cate globuri albastre sunt?
475+a=673
a=673-475
a=198
Cate globuri galbene sunt?
g+a= 524
g+198=544
g=544-198
g= 346
Cate globuri rosii sunt?
r+346+198=673
r=673-346-198
r=129
129+346+198=
475+198=673
succes!