If the point (a, 7) lies on the graph of the equation 5x - y = 8, then a = ?

Solution:

Given point (a, 7) and equation 5x - y = 8

The point satisfies the equation so put (a, 7) in place of (x, y)

⇒ 5(a) - 7 = 8

⇒ 5a - 7 =8

⇒ 5a = 8 + 7

⇒ 5a = 15

⇒ a = 15/5 = 3

a=3

If the point (a, 7) lies on the graph of the equation 5x - y = 8, then a = ?

Summary:

If the point (a, 7) lies on the graph of the equation 5x - y = 8, then a = 3.