Thursday

November 27, 2014

November 27, 2014

Posted by **Angie** on Monday, April 20, 2009 at 6:06pm.

I already wrote the equations: n+d=21 and 10d+5n=1.70. But I don't know how to solve it..

- Math -
**TchrWill**, Tuesday, April 21, 2009 at 9:50amYou have a total of 21 coins, all nickels and dimes. The total value is $1.70. Write and solve a system of equations to find the number of dimes d and the number of nickels n that you have.

I already wrote the equations: n+d=21 and 10d+5n=1.70. But I don't know how to solve it.

1--n+d=21

2--10d+5n=170

3--From (1), d=21-n

4--Substitute into (2) and solve for n and then d.

- Math -
**Angie**, Tuesday, April 21, 2009 at 6:40pmi get it..thanks!

**Answer this Question**

**Related Questions**

Algebra - This is a word problem I am supposed to solve with systems. I am ...

Algebra - Anne has 20 coins in her pocket consisting of nickels and dimes only. ...

math algebra 1 - There are 4 times as many nickels as dimes in a coin bag. The ...

math - There are 60 coins in a box containing only nickels, dimes, and quarters...

Algebra - Nadia has 32 coins made up of nickles, dimes, and quarters. The sum of...

Algebra - Nadia has 32 coins made up of nickles, dimes, and quarters. The sum of...

Algebra - Nadia has 32 coins made up of nickles, dimes, and quarters. The sum of...

Algebra - Nadia has 32 coins made up of nickles, dimes, and quarters. The sum of...

algebra help - Solve the problem. Joe has a collection of nickels and dimes that...

math - Joe has a collection of nickels and dimes that is worth $6.20. If the ...