SOLUTION: Kevin has a total value of $135 in 5 and 10 dollar bills. He has 18 bills total. Use linear systems to determine how many 5's and 10's Kevin has in his possession.

Question 958304: Kevin has a total value of $135 in 5 and 10 dollar bills. He has 18 bills total. Use linear systems to determine how many 5's and 10's Kevin has in his possession.
Answer by macston(5194) (Show Source): You can put this solution on YOUR website!
F=fives; T=tens
F+T=18
F=18-T
$5F+$10T=$135 Substitute for F
$5(18-T)+$10T=$135
$90-$5T+$10T=$135 Subtract $90 from each side.
$5T=$45 Divide each side by $5.
T=9 ANSWER 1: There are 9 ten dollar bills.
F=18-T=18-9=9 ANSWER 2: There are 9 five dollar bills.
CHECK:
$5F+$10T=$135
$5(9)+$10(9)=$135
$45+$90=$135
$135=$135

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