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January 30, 2015

January 30, 2015

Posted by **Anonymous** on Sunday, May 1, 2011 at 5:29pm.

- Algebra 1 -
**Reiny**, Sunday, May 1, 2011 at 6:04pmsub the second into the first ....

5(47-7y) + 9y = 53

solve this for y, then back-substitute into the 2nd

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