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suma a 4 numere consecutive impare care sa deie 24

Răspuns :

a + a + 2+ a + 4 + a + 6 = 24
4a + 12 = 24
4a = 24 - 12
4a = 12
a = 12:4
a = 3 (primul nr)

a+2=3+2=5 (al doilea nr)

a+4=3+4=7 (al treilea nr)

a+6=3+6=9 (al patrulea nr)

verificare:
3+5+7+9=24
x+x+2+x+4+x+6=24
4x+12=24
4x=24-12
4x=12
x=12:4
x=3

x+2=3+2=5

x+4=3+4=7

x+6=3+6=9