SOLUTION: You have 10 conis that total 85 cents.Some are Dimes and Some are Nickels. How many of each coin do you have?

Question 428319: You have 10 conis that total 85 cents.Some are Dimes and Some are Nickels. How many of each coin do you have?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
You have 10 conis that total 85 cents.Some are Dimes and Some are Nickels. How many of each coin do you have?
---
Equations:
n + d = 10 coins
5n+10d = 85 cents
----------
Multiply thru the 1st equation by 5:
5n + 5d = 50
5n + 10d = 85
------
Subtract and solve for "d":
5d = 35
d = 7 (# of dimes)
-----
Solve for "n":
n+d = 10
n + 7 = 10
n = 3 (# of nickels)
========================
Cheers,
Stan H.
========================

RELATED QUESTIONS
Suppose you have 12 coins that total 32 cents. Some of the coins are nickels and the rest (answered by vleith,ptaylor)

Write a linear system that models the situation and solve. You have a total of 5... (answered by jim_thompson5910)

Problem Solving: How to solve: Supppose you have 10 coins that total $0.85. Some coins... (answered by brina_math)

Suppose you have 28 coins that total $2.25. Some coins are dimes and some are nickels.... (answered by macston)

Suppose you have 12 coins that total 32 cents. Some coins are nickels, while the rest... (answered by katealdridge,rwm)

Suppose you have 33 coins. Some are quarters and some are dimes. The coins are worth a... (answered by josgarithmetic)

Problem Solving With Systems of A line: How to Solve Suppose you have 10 coins that... (answered by checkley71)

Problem Solving: How to solve: Supppose you have 10 coins that total $0.85. Some coins... (answered by checkley71)

I have 75 coins with a total value of $ 6.50. the coins are dimes and nickels. how many... (answered by ewatrrr)