Find a point on the line x + 2y = 9 where the ordinate is equal to the abscissa
Given, X=Y
Let the required point be (a, a)
Since it lies on the line, it is a solution of the equation x + 2y = 9
Hence, a + 2a = 9
3a = 9
a = 3
The required point is (3, 3)