Description
Dan has a total of 12 bills in his wallet some are $5 and the rest are $10. the total value of the $12 is $115. How many $5 bills and how many $10 bill does he have?
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Explanation & Answer
f+t=12
5f+10t=115
solve for f in equation 1
f=12-t
substitute into eqn 2
5(12-t)+10t=115
60+5t=115
5t=55
t=11
substitute back into eqn 1
f+11=12
f=1
One five , and 11 tens.
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