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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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Asked 5/1/2015 6:57:05 PM
Updated 5/2/2015 4:51:03 AM
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This answer has been confirmed as correct and helpful.
Edited by Andrew. [5/2/2015 4:51:02 AM], Confirmed by Andrew. [5/2/2015 4:51:03 AM]
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