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Suma a 5 nr impare consecutive e 45. Care sunt nr? Ajutatima dau coroana

Răspuns :

x+1+x+3+x+5+x+7+x+9=45
5x+25=45
5x=20
x=4
x+1=5
x+3=7
x+5=9
x+7=11
x+9=13
|----|
|----|+2
|----|+2+2
|----|+2+2+2
|----|+2+2+2+2
45-20=25
25:5=5 primul nr
5+2=7 al doilea nr
5+2+2=9 al treilea nr
5+2+2+2=11 al patrulea ne
5+2+2+2+2=13 al cincilea nr
V:5+7+9+11+13=45