Friday

February 27, 2015

February 27, 2015

Posted by **Mathew** on Thursday, January 13, 2011 at 8:34pm.

it says i have to solve this by the elimination method, and i cant seem to figure out.

- Math -
**PsyDAG**, Friday, January 14, 2011 at 11:37amLet x = number of $1 coins and y = number of $2 coins.

x = 5y - 8

x - 5y = -8

x + 2y = 160

Multiply first equation by 2 and second by 5.

2x - 10y = -16

5x + 10y = 800

Add the two equations.

7x = 784

x = ?

Put value of x in first equation to find y. To check, put both values into the second equation.

**Answer this Question**

**Related Questions**

To Helper - I had a problem to solve, and I dont get how to make equations from ...

Math - Susan has some $2-coins and $5-coins. If there are 18 coins and the total...

5th grade math - I need to use quarters, dimes, nickles and pennies to make the ...

maths - A bag contained a number of 20cents, 50cents and $1 coins. 1/3 of the ...

Math - Make your own equation. 1. A number is 6 times another number. The sum of...

Math - Algebra - The number 350 is separated into three parts (numbers). ...

Math,Ratio - the ratio of the number of coins Azam had to the number of coins ...

Math - A bag contains forty coins, all of them either 2c or 5c coins. Let there ...

Math,Ratio - the ratio of the number of coins Azam had to the number of coins ...

Algebra - Andy has 145 coins in his coin bank. THe number of 5-denomination ...