Question

suma a cinci numere naturale pare consecutive este 40 aflati numerele cu ecuatii

Answer 1

ok, o scriu algebriic:
a+a+2+a+4+a+6+a+8=40
5a+20=40
5a=20
a=20:4
a=4.
a+2=6.
a+4=8.
a+6=10.
a+8=12.

Answer 2

a+(a+2)+(a+4)+(a+6)+(a+8)=40
5 x a +20=40
5xa=20
a=4
a+2=6
a+4=8
a+6=10
a+8=12