Question

Use the elimination method to solve the system of equations. Choose the correct ordered pair.

- x + y = -3
3x + 2y = 9
A. (3,0)
B. (6,3)
C. (5,2)
D. (4,1)

Answer 1

answer is a
x=3+y
3*(3+y)+2y=9
9+3y+2y=9
y=0
x=3
(3;0)

Answer 2

A. (3, 0).

Explanation:

- x + y = -3

3x + 2y = 9 Multiply the first equation by -2:

2x - 2y = 6 Adding the last 2 equations to eliminate y:

5x = 15

x = 3.

Substitute for x in the second equation:

3(3) + 2y = 9

2y = 9 - 9 = 0

y = 0.