Matrices And Determinants

If p\(\ne\) q \(\ne\) r and \(\left| {\matrix{ 0 & {x - p} & {x - q} \cr {x + p} & 0 & {x - r} \cr {x + q} & {x - r} & 0 \cr } } \right| = 0\), then the value of x which satisfy the equation is