SOLUTION: Sam has 30 nickels and dimes worth $2.40. How many nickels does he have?
Algebra.Com
Question 299071: Sam has 30 nickels and dimes worth $2.40. How many nickels does he have?
Answer by checkley77(12844) (Show Source): You can put this solution on YOUR website!
N+D=30 OR N=30-D
.05N+.10D=2.40
.05(30-D)+.10D=2.40
1.5-.05D+.10D=2.40
.05D=2.40-1.5
.05D=.90
D=.90/.05
D=18 NUMBER OF DIMES.
N=30-18
N=12 NUMBER OF NICKELS.
PROOF:
.05*12+.10*18=2.40
.60+1.80=2.40
2.40=2.40
RELATED QUESTIONS
Phil has 100 nickels and dimes worth $6.10. how many nickels does he... (answered by stanbon)
Warren has 40 coins; nickels dimes and quarters worth $4.05. He has seven more nickels... (answered by ankor@dixie-net.com)
Will has 40 coins( nickels, dimes, and quarters) worth $4.05. He has more nickels than... (answered by Edwin McCravy)
Jose has been collecting dimes and nickels. He has 24 coins (only dimes and nickels)... (answered by Alan3354)
Warren has 40 coins (all nickels, dimes, and quarters) worth $4.05. He has 7 more... (answered by stanbon)
Warren has 40 coins (all nickels, dimes, and quarters) worth $4.05. He has 7
more... (answered by scott8148)
Warren has 40 coins (all nickels, dimes, and quarters) worth $4.05. He has 7 more... (answered by nerdybill)
Warren has 40 coins (all nickels, dimes, and quarters) worth $4.05. He has 7 nore nickels (answered by ikleyn)
Phil has 50 nickels and dimes worth $4.15. How many dimes does he... (answered by neatmath,josmiceli)