Homework Help: math

Posted by Jane on Thursday, December 29, 2011 at 6:12pm.

Please show me how to solve:

Sharon has some one-dollar bills and some five-dollar bills. She has 14 bills. The value of the bills is $30. Solve a system of equations using elimination to find how many of each kind of bill she has.

math - bobpursley, Thursday, December 29, 2011 at 6:41pm
ONE*1+FIVE*5=30

where ONE is the number of ones, and FIVE is the number of fives.

ONE+FIVE=14
Five=14-ONE

ONE*1+(14-ONE)5=30
ONE+70-5*ONE=30
-4ONE=-40
ONE=8 bills, then FIVE =6

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