If for some and in R, the intersection of the following three planes x + 4y - 2z = 1 x + 7y - 5z = x + 5y + z...

Question

If for some and in R, the intersection of the following three planes x + 4y - 2z = 1 x + 7y - 5z = x + 5y + z = 5 is a line in R^3, then + is equal to

Accepted Answer

(C)

JEE Main 2020 Mathematics question

Solution