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Solve the equation 3x + 5y = 20, 2x - 5y = 5?
3x + 5y = 20, 2x - 5y = 5 , (3x + 5y = 20) + (2x - 5y = 5) , 5x = 25 , x = 25/5 , x = 5 , 3(5) + 5y = 20, 15 + 5y = 20 , 5y = 20 - 15 , 5y = 5 , y = 5/5 , y = 1 , Solution set: x = 5, y = 1
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Asked 7/14/2009 6:55:22 PM
Updated 7/14/2018 2:02:07 PM
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Edited by Masamune [7/14/2018 2:02:04 PM]
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3x + 5y = 20,
2x - 5y = 5 ,

(3x + 5y = 20) + (2x - 5y = 5) ,
5x = 25 ,
x = 25/5 ,
x = 5 ,

3(5) + 5y = 20,
15 + 5y = 20 ,
5y = 20 - 15 ,
5y = 5 ,
y = 5/5 ,
y = 1 ,

Solution set: x = 5, y = 1
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Added 7/14/2018 2:02:07 PM
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