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Stiind ca m + n = 1518 iar p = m + n - 329 , atunci m + n + p = ?

Răspuns :

m+n=1518 p=m+n-329 p=1518-329=1189 p+n+m=1189+1518=2707
m+n=1518
p=m+n-329
atuci:m+n+p=1518+(1518-329)
1518+1189=2707