SOLUTION: Charles has $ 2.75 in dimes and nickles. The number of nickels is one less than twice the number of dimes. How many of each type of coin does he have?

Question 819782: Charles has $ 2.75 in dimes and nickles. The number of nickels is one less than twice the number of dimes. How many of each type of coin does he have?
Answer by TimothyLamb(4379) (Show Source): You can put this solution on YOUR website!
5n + 10d = 275
n = 2d - 1
---
5n + 10d = 275
5(2d - 1) + 10d = 275
10d - 5 + 10d = 275
20d = 280
---
d = 14
n = 27
---
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
Charles has $2.75 in dimes and nickles. The number of nickles is one less than twice the... (answered by TimothyLamb)

Can you show me the correct way to work this problem through systems of linear equations? (answered by stanbon)

a collection of nickles and dimes is worth $2.90. The number of dimes is one less than... (answered by tpender)

a box contains nickels, dimes and pennies worth $5.56. the number of pennies is one more... (answered by TimothyLamb)

Victoria has 88 coins consisting of nickels, dimes, and quarters. The number of dimes is (answered by Paul)

A handful of 65 coins consist of pennies, nickles, and dimes. The number of nickels is 4... (answered by checkley77)

Some number of dimes plus Nickels equal $7.20 . the number of dimes is three less than... (answered by macston)

A kid has dimes and nickles in a bag, if the number of nickles is 5 more than twice the # (answered by jorel1380)

Jesse has 38 nickels and dimes. The number of nickels is 1 less than twice the number of... (answered by fractalier)