If p, q and r are positive integers and satisfy x = (p + q - r)/r = (p - q + r)/q = (q + r - p)/p, then the value of x is?
Choose the correct choice:	A) 81	B) 1	C) 9	D) 8	E) 6
Hence, x = (p + q - r)/r = (p - q + r)/q = (q + r - p)/p   =&gt; x = (p + q - r + p - q + r + q + r - p)/(r + q + p)   =&gt; x = (p + q + r)/(r + q + p) = 1.   Answer: 1
<result>B</result>
If p, q and r are positive integers and satisfy x = (p + q - r)/r = (p - q + r)/q = (q + r - p)/p, then the value of x is?