Sunday

March 1, 2015

March 1, 2015

Posted by **Jay** on Wednesday, February 15, 2012 at 8:09pm.

- algebra -
**PsyDAG**, Thursday, February 16, 2012 at 9:32pmLet x = # nickels and y = # dimes

x = 76 - y

5x + 10y = 555

Substitute 76-y for x in second equation and solve for y. Insert that value into the first equation and solve for x. Check by inserting both values into the second equation.

- algebra -
**Brian S.**, Sunday, February 19, 2012 at 11:38amAgree with this solution.

Worth pointing out that x = 76 - y originates from the formula x + y = 76. In case Jay / anyone else can't seem to get that far when solving similar problems on their own.

5x + 10y = 555 because a nickel is worth 5 cents and dime is worth 10, for a total of 555 cents. When doing these in school I would sometimes assign a variable like n and d so I'd never forget what a variable represents or accidentally get them switched around in my answer.

This also carries over nicely when solving problems like these in computer programming.

Good stuff PsyDAG

**Answer this Question**

**Related Questions**

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 ...

math - Joe has a collection of nickels and dimes that is worth $8.55. If the ...

Math - Joe has a collection of nickels and dimes that is worth $6.05 if the ...

algebra - total $3.25 worth of coins nickels, dimes, quarters 2morenickels than ...

algebra - Gail has a collection of nickels, dimes, and quarters that is worth $7...

math - Jo has 37 coins (all nickels, dimes and quarters) worth $5.50. She has 4 ...

Algebra - I have19 coins that are worth a total of $1.10.If they consist only of...

Math - Lianne has nineteen coins worth $1.45. Some of her coins are dimes & the ...

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