Question

Caii Roibu,Balanu,Murgu cantaresc in total 790 kg.Roibu si Balanu cantarescla un loc 542 kg ,iar Murgu si Balanu cantaresc impreuna 535 kg.Afla masa fiecarui cal.

Answer 1

R+B+M=790
R+B=542
B+M=535
1.Cate kg cantareste Murgu?
790-542=248
2.Dar Roibu?
790-535=255
3.Dar Balanu?
542-255=287
VERIFICARE 287+255+248=790

Answer 2

R+B+M=790kg
R+B=542kg
M+B=535kg
-------------------
R=?;B=?;M=?

M=790-542
M=248 kg.

R=790-535
R=255 kg

B=790-(248+255)
B=790-503
B=287 kg.

248+255+287=790 kg