What is the solution of the system? Use elimination. 3x – 4y = 9 –3x + 2y = 9
A. (3, 9)
B. (–27, –9)
C. (–3, –6)
D. (–9, –9)

3x – 4y = 9
–3x + 2y = 9
(3x – 4y = 9) + (–3x + 2y = 9);
-2y = 18;
y = 18/-2;
y = -9;
3x – 4(-9) = 9;
3x + 36 = 9;
3x = 9 - 36;
3x = -27;
x = -27/3;
x = -9;
The solution set is (–9, –9).

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