Răspuns :
a+a+1+a+2+a+3+a+4=120
5a+10 =120 l -10
5a=110
a=110:5
a=22
a+1=23
a+2=24
a+3=25
a+4=26
5a+10 =120 l -10
5a=110
a=110:5
a=22
a+1=23
a+2=24
a+3=25
a+4=26
a primul nr : a+1 al doilea nr a+2 a+3,a+4,
a+a+1+a+2+a+3+a+4=120
5a+10=120
5a=120-10
5a=110
a=110/5 a=22
a=22 primul nr
22+23+24+25+26=120
a+a+1+a+2+a+3+a+4=120
5a+10=120
5a=120-10
5a=110
a=110/5 a=22
a=22 primul nr
22+23+24+25+26=120