Equation of plane containing line of intersection of the given planes is (x−2y+z+2)+λ(3x−y−z+1)=0 This plane also passes through (1,1,1). ∴(1−2+1+2)+λ(3−1−1+1)=0 ⇒λ=−1 ∴ Required plane 2x+y−2z−1=0 x-intercept of these plane is (x,0,0) ⇒2x−1=0 x=