Question

What is the y-coordinate for the solution to the system of equations? {−x+3y=9 {y=2/3x

Answer 1

y = 6

Explanation:

3 y - x = 9

y = (2 x)/3

Substitute y = (2 x)/3 into the first equation:

{x = 9

y = (2 x)/3

Substitute x = 9 into the second equation:

Answer:

x = 9

y = 6