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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)

Respuesta :

abcdef96
answer is a
x=3+y
3*(3+y)+2y=9
9+3y+2y=9
y=0
x=3
(3;0)

Answer:

A.  (3, 0).

Step-by-step 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.

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