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Mathematics 20 Online
OpenStudy (anonymous):

I will give a medal to the most helpful answer! Can anyone please tell me what two different methods I should try using for each question below? I have to choose two different methods to solve the problem and then select the more efficient method. I am coming up blank with which methods to use. a. 3x-9y=3 6x-3y=-24 b. 7x-3y=20 5x+3y=16 c. y=1/2x-6 2x+6y=19

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