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Suma a patru numere consecutive este 124.afla nr .

Răspuns :

a, b=a+2, c=a+4, d=a+6

a+a+2+a+4+a+6 = 124
4a = 112
a = 28
b = 30
c = 32
d = 34
a+b+c+d = 124
a |____|
b |____|+2
c |____|+4
d |____|+6
avem 4 segmente egale+2+4+6 = 124
124 - (2+4+6) = 124-12 = 112
112:4 = 28 ( un segment)
a = 28
b = 28+2 = 30
c = 28+4 = 32
d = 28+6 = 34

Verificare:
28+30+32+34 = 124

Numerele consecutive pare sunt:
28; 30; 32; 34