Question

petrisor ,george si miruna au impreuna 924 de timbre .petrisor si george au ampreuna 670 de timbre ,iar george si miruna au ampreuna 562 de timbre .cate timbre are fiecare copil ?

Answer 1

P+G+M=924   P+G=670  G+M=562   Inlocuim in prima 670+M=924 aflam pe M =924-670=254 inlocuim in ecuatia G+M=562 Si aflam pe G=562-254=308 Apoi aflam pe P din P+G=670 deci P=670-308=362   Deci Petrisor=362 timbre ,George=308 timbre,Miruna=254

Answer 2

p+g+m=924
p+g=670
g+m=562
m=924-670=254 timbre are Miruna
p=924-562=362 timbre are Petrisor
g=562-254=308 timbre are George