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3x +y = 11     x - y = 25

 Mar 15, 2019
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I'm assuming you want to find X and Y. Add the two equations and the y's cancel out. So we have 4x = 36, so x = 9. Substitute this into either of the equations, and you can see that y = -18.

 

Hope this helps!

 Mar 15, 2019

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