Question

Which ordered pale is a solution to the system of equations?

3x - 3y = -9
2x + y = -3
A (0,3)
B (0, -3)
C (-2, 1)
D (1, 2)

Answer 1

c) (-2, 1)

Explanation:

3x - 3y = -9

2x + y = -3

2x + y = -3

-2x -2x

y = -2x - 3

3x - 3y = -9

y = -2x - 3

3x - 3(-2x - 3) = -9

3x + 6x + 9 = -9

9x + 9 = -9

- 9 -9

9x = -18

/9 /9

x = -2

y = -2x - 3

y = -2(-2) -3

y = 4 - 3

y = 1

(x, y) --> (-2,1)

Check your answer:

y = -2x - 3

1 = -2(-2) - 3

1 = 4 - 3

1 = 1

This statement is true

Hope this helps!