Question 1012184
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F=number of $5 bills; T=number of $10 bills=F+4
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$5F+$10T=$160
$5F+$10(F+4)=$160
$5F+$10F+$40=$160
$15F=$120
F=8
ANSWER 1: There are 8 five dollar bills.
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T=F+4=8+4=12
ANSWER 2: There are 12 ten dollar bills.
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CHECK:
$5F+$10T=$160
$5(8)+$10(12)=$160
$40+$120=$160
$160=$160