SOLUTION: A box contains nickels, dimes and quarters worth a total of $2.10. There are twice as many dimes as quarters, and the number of nickels is two less than the number of dimes. How ma

Question 819944: A box contains nickels, dimes and quarters worth a total of $2.10. There are twice as many dimes as quarters, and the number of nickels is two less than the number of dimes. How many of each coin are there?
Answer by TimothyLamb(4379) (Show Source): You can put this solution on YOUR website!
5n + 10d + 25q = 210
d = 2q
n = d - 2
---
5n + 10d + 25q = 210
0n + d - 2q = 0
n - d + 0q = -2
---
solve the above system of linear equations for n, d, and q:
---
answer:
n = 6
d = 8
q = 4
---
Solve and graph linear equations:
https://sooeet.com/math/linear-equation-solver.php
---
Solve quadratic equations, quadratic formula:
https://sooeet.com/math/quadratic-formula-solver.php
---
Calculate and graph the linear regression of any data set:
https://sooeet.com/math/linear-regression.php
RELATED QUESTIONS
A box of coins contains a total of 26:00 in nickels, dimes, and quarters. If there is the (answered by stanbon)

A box of coins contains a total of 26:00 in nickels, dimes, and quarters. If there is the (answered by oberobic)

A coin collection contains nickels, dimes, and quarters. There are twice as many dimes as (answered by ikleyn)

a coin collection contains nickels dimes quarters there are twice as many dimes as... (answered by dabanfield@earthlink.net)

A piggy bank contains $3.20. There are twice as many nickels as quarters and half as many (answered by macston)

A box of coins contains a total of $26.00 in nickels, dimes, and quarters. If there is... (answered by richwmiller)

A box of coins contains a total of 26:00 in nickels, dimes, and quarters. If there is the (answered by mananth)

a coin-sorting machine contains nickels, dimes and quarters worth $5.50. there are 3... (answered by checkley79)

A child's piggy bank contains nickels, dimes, and quarters. There are twice as many... (answered by jorel1380)