Răspunsuri

2014-05-21T22:24:00+03:00
Coada-x
capul-y
trunchiul-z

x=1,5
y=(z+x)/2

z=y+x

y=(y+x+x)/2
y=(y+2*1,5)/2
y=(y+3)/2
2y=y+3
2y-y=3
y=3

z=3+1,5=4,5
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2014-05-21T22:28:22+03:00
Fie a=coada, b=trunchiul, c=capul
c= (a+b) / 2
b= a+c => c=b-a
b-a = (a+b) / 2
a = 1,5
b - 1.5 = (1.5 + b) / 2
2b - 3 = 1.5 + b
b = 4.5
c = 4.5 - 1.5 = 3
=> Coada are 1,5 kg, trunchiul are 4,5 kg, iar capul are 3 kg => 1.5 + 4.5 + 3 = 8 kg
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