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19-12-2016
Mathematics

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2x + y = -2
x + y = 5

The x-coordinate of the solution to the system shown is _____.

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texaschic101 texaschic101

19-12-2016

2x + y = -2
x + y = 5...multiply by -1
----------------
2x + y = -2
-x - y = -5 (result of multiplying by -1)
---------------add
x = -7 <==

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