Posted by **Presley** on Monday, March 22, 2010 at 11:55pm.

Elimination using addition and subtraction:

1.

x - y = 1

x + y = 3

2.

-x + y = 1

x + y = 11

3.

x + 4y = 11

x - 6y = 11

4.

-x + 3y = 6

x + 3y = 18

PLEASE HELP!!!!

I NEED HELP ASAP!!!!

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