Question

Please helppp 15 pointsss What is the y-coordinate of the solution for the system of equations?

{y=3x−1x−y=−9

Answer 1

14

Explanation:

Took the test got a 100

Answer 2

y = 3x - 1

x - y = -9

Subs y in second equation.

x - (3x - 1) = -9

x - 3x + 1 = -9

-2x = -9 - 1

-2x = -10

x = -10/-2

x = 5

Subs x

y = 3x - 1

y = 3.5 - 1

y = 15 - 1

y = 14