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February 28, 2015

February 28, 2015

Posted by **Christina** on Tuesday, May 31, 2011 at 5:48pm.

7. x-y=8

x+y=-2

- Math -
**PsyDAG**, Tuesday, May 31, 2011 at 6:40pmOne way is to add the two equations.

2x = 6

x = 3

Insert that value into one of the equations.

y = -5

Check by inserting both values into the other equation.

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