Question

If the point (5, k) lies on the line represented by the equation 2x + y = 9, the value of k is

Answer 1

k = -1

Explanation:

We have the point (5, k) and the equation 2x + y = 9.

Put the coordinates of the point ot the equation:

x = 5, y = k

2(5) + k = 9

10 + k = 9 subtract 10 from both sides

10 - 10 + k = 9 - 10

k = -1