If x + 1/y = 1 and y + 2/z = 1 and x = 3, what is the value of the product xyz?
x + 1/y = 1
3 + 1/y = 1
1/y = -2
y = -1/2
y + 2/z = 1
-1/2 + 2/z = 1
2/z = 3/2
z/2 = 2/3
z = 4/3
xyz = (3) (-1/2) (4/3) = -2
