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January 31, 2015

January 31, 2015

Posted by **geeh mommah** on Friday, March 23, 2012 at 3:16am.

- math -
**Reiny**, Friday, March 23, 2012 at 9:11am2r + 3t = 31

3r + 2t = 29

1st times 2 ---> 4r + 6t = 62

2nd times 3 --> 9r + 6t = 87

subtract them

5r = 25

r = 5

back into the first ---> 10 + 3t = 31

3t = 21

t = 7

record costs $5 ,and a tape costs $7

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