Question

suma a cinci numere consecutive este 55. afla valoarea fiecarui numar

Answer 1

Notam primul nr cu:a/ Al doilea cu b/ Al treilea cu c/ Al patrulea cu d/ Al cincelea cu e/ a+b+c+d+e=55/ a=?/ b=a+1/ c=a+2/ d=a+3/ e=a+4/ a+a+1+a+2+a+3+a+4=55/ 5a+10=55/-10/ 5a=45/:5/ a=9/ b=9+1=10/ c=9+2=11/ d=9+3=12/ e=9+4=13/

Answer 2

a,b,c,d,e= consecutive
a+b+c+d+e=55
b=a+1; c=a+2; d=a+3; e=a+4
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inlocuim :a+a+1+a+2+a+3+a+4=55
5a+10=55/:5
a+2=11
a=9
b=10
c=11
d=12
e=13