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Solve the system of equations: 3x + y = 7 x + y = 5
3x + y = 7 x + y = 5 3x + y = 7 y = -x + 5 3x + (-x + 5) = 7 3x - x + 5 = 7 2x + 5 = 7 2x = 7 - 5 2x = 2 x = 2/2 x = 1 1 + y = 5 y = 5 - 1 y = 4 Solution set: x = 1, y = 4
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Asked 10/30/2013 1:37:00 PM
Updated 12/28/2017 7:10:29 PM
1 Answer/Comment
Edited by Masamune [12/28/2017 7:10:26 PM]
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3x + y = 7
x + y = 5

3x + y = 7
y = -x + 5

3x + (-x + 5) = 7
3x - x + 5 = 7
2x + 5 = 7
2x = 7 - 5
2x = 2
x = 2/2
x = 1

1 + y = 5
y = 5 - 1
y = 4

Solution set: x = 1, y = 4
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Added 12/28/2017 7:10:29 PM
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