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March 30, 2015

March 30, 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.

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