Răspuns:
Explicație pas cu pas:
320*25/100 = 80
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zarul are 6 fete
fetele cu numar patrat perfect: 1; 4
P = 2/6 = 1/3
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x/3 = 6/2
x = 3*6/2 = 9
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4/0,2 = 4 : 0,2 = 4 : 2/10 = 4 * 10/2 = 4*5 = 20
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3/25 = 12/100 = 12%
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x/2 = y/3 = z/5
x = 2y/3
z = 5y/3
xyz = 2y/3*y*5y/3 = 10y^3/9
10y^3/9 = 810
y^3 = 9*810/10 = 9*81 = 9*9^2 = 9^3
y = 9
x = 2*9/3 = 6
z = 5*9/3 = 15
