Question
Suppose that →p,→q and →r are three non-coplanar vectors in R3 . Let the components of vector of a vector →s along →p,→q and →r be 4, 3 and 5 respectively. If the components of this vector →s along (−→p+→q+→r) , (→p−→q+→r) and (−→p−→q+→r) are x,y and z respectively , then the value of 2x+y+z is