Question

If the point with coordinate
(k,7) lies on the equation 2x−y=5 determine the value of k

Answer 1

k = 6

Explanation:

The point (k, 7) lies on the line with the equation 2x - y = 5

• Substitute the coordinates of the point in the equation
• 2(k) - 7 = 5
• 2k = 12
• k = 6

Answer 2

k = 6

Explanation:

since (k, 7 ) lies on the line then it satisfies the equation.

substitute the coordinates of the point into the equation and solve for k

2k - 7 = 5 ( add 7 to both sides )

2k = 12 ( divide both sides by 2 )

k = 6