Question

On the graph of the equation 5x - y = 8, the point whose y-coordinate is 7 has an x-coordinates of ?

Answer 1

x = 3

Explanation:

To find the x-coordinate, substitute y = 8 into the equation abd solve for x

5x - 7 = 8 ( add 7 to both sides )

5x = 15 ( divide both sides by 5 )

x = 3

Thus (3, 7) is a solution to the equation

Answer 2

Answer: x = 3

Explanation:

5x - y = 8

It is given that y = 7, so substitute "y" with "7" into the equation:

5x - (7) = 8 substituted y with 7

5x = 15 added 7 to both sides

x = 3 divided both sides by 5

When y = 7, then x = 3 ⇒ the coordinate is (3, 7)