Răspuns :

Răspuns:

Explicație pas cu pas:

Masini negre ____

Masini rosii ____ ____

Masini albe ____ ____ ____ ____ ____ ____

Total 9 parti egale = 72 masini

1 parte = 72 : 9 = 8 masini

Masini negre = 8

Masini rosii = 8 x 2 = 16

Masini albe = 8 x 6 = 48 (sau 16  x 3 = 48)

Dianageorgiana794id

Răspuns:

a+r+n=72

r=2n=>n=r/2

r=a/3=>a=3r

²⁾3r+²⁾r+r/2=²⁾72

6r+2r+r=144

r=144:9=>r=16 masini rosii

n=r:2=>n=16:2=8 masini negre

a=3·16=>a=48 masini albe

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