Posted by geeh mommah on Friday, March 23, 2012 at 3:16am.
2r + 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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