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January 28, 2015

January 28, 2015

Posted by **Rick** on Thursday, September 30, 2010 at 6:31pm.

- algebra -
**bobpursley**, Thursday, September 30, 2010 at 6:32pm45=Z+R

9.75R+8.5Z=398.75

R=45-Z

put that in for R in the second equation, and solve.

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