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Using elimination, find the common solution for these equations. x - 2y = 14 x + 3y = 9
x - 2y = 14 x + 3y = 9 Subrtract eq. 1 from eq. 2: (x + 3y = 9) - (x - 2y = 14): 5y = -5 y = -5/5 = -1 Plug y = -1 x - 2(-1) = 14 x + 2 = 14 x = 14 - 2 x = 12 Solution set: (12, -1)
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Asked 5/7/2013 4:13:44 PM
Updated 1/13/2016 8:20:42 AM
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Edited by Andrew. [1/13/2016 8:20:36 AM]
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x - 2y = 14
x + 3y = 9
Subrtract eq. 1 from eq. 2:
(x + 3y = 9) - (x - 2y = 14):
5y = -5
y = -5/5 = -1
Plug y = -1
x - 2(-1) = 14
x + 2 = 14
x = 14 - 2
x = 12
Solution set: (12, -1)
Added 1/13/2016 8:20:42 AM
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