Question

2 cutii cu biscuiti cantaresc 33 de kg. a doua cutie cantareste mai mult cu 3 kg decat prima.cat cantareste fiecare cutie

Answer 1

a+b=33
b=a+3
a+3+a=33
2a=30
a=15
b=15+3=18

Answer 2

1cutie |--|
2cutie |--||+3kg|
acolada, 33 kg
Rezolvare:
|--|=x
x+x+3=33
2x=33-3
2x=30
x=30:2
x=15
x+3=15+3
x+3=18

Raspuns:
1cutie = 15 kg 
2cutie = 18 kg

Verificare:
15+18=33!