Question

Mara Bianca si Gabriela au impreuna nucu .Mara si Bianca au impreuna 37 nuci.Bianca si Gabriela au impreuna 40 nuci iar Mara si Gabriela au impreuna 33 nuci.
Cate nuci are fiecare dintre cele 3 fetite ?

Answer 1

Răspuns:

gabriela are 18 nuci

mara are 15 nuci

bianca are 22 nuci

Explicație pas cu pas:

notam :

cu M mara

cu B bianca

cu G gabriela

M+B=37 nuci

B+G=40 nuci

M+G=33 nuci

M=? ; G=? ; B=?

M=37-B

B=40-G

inlocuim in M+G=33 nuci

37-(40-G)+G=33 nuci

desfacem paranteza : 37-40+G+G=33 nuci

-3+2G=33 nuci.... adunam 3

2G=36 nuci .... impartim cu 2

G=18 nuci => gabriela are 18 nuci

M+G=33

M+18=33 => M=33-18 => M=15 .......=> mara are 15 nuci

M+B=37 nuci

15+B=37

B=37-15=22 => bianca are 22 nuci