The substitution zwy 2 transforms the non linear DE y a x y b x y 0 to the lin Oz 4a x z 4b x Oz 5a x z 5b x None of these Oz 2a x z 2b x Oz a x z b x changes to this answer e substitution z y 1 transforms the non linear DE y a x y b x y 0 to the linear DE z 2a x z 2b x None of these z 5a x z 5b x z a x z b x