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Valeria si Alecsa au impreuna 38 de papusi. Valeria are cu 18 papusi mai multe.Cate papusi are fiecare?

Răspuns :

38-18=20 papusi are valeria20+18=38  impreuna
valeria=v
alecsa=a
v+a=38
v=a+18
a+18+a=38
2a+18=38
2a=20
Alecsa=10 papusi
Valeria=10+18=28 papusi