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suma a 5 nr consecutive impare este 75 Afla nr

Răspuns :

n+n+2+n+4+n+6+n+8=75
5n+20=75
5n=75-20
5n=55
n=11
a+(a+2)+(a+4)+(a+6)+(a+8)=75 5a+2+4+6+8=75 5a=75-(8+6+4+2) 5a=55 a=55:5 a=11