algebra

posted by .

Joe has a collection of nickles and dimes that is worth $7.65.If the number of dimes was doubled and the number of nickles was increased by 35, the value of the coins would be $14.30. How many nickles and dimes does he have?

  • algebra -

    It's spelled nickels.

    Let x = number of nickels (originally)
    let y = number of dimes (originally)

    5x + 10y = 765

    5*(x + 35) + 10*(2y) = 1430
    5x + 20y = 1430 - 175 = 1255

    The x terms are easily eliminated
    10 y = 490

    y = 49
    5x = 765 - 490 = 275
    x = 55

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. math- word problems

    I tried doing this problem but i just don't get it: A boy has 16 coins consisting of nickles, dimes, and quarters. The number of nickles is 3 less than the number of dimes and the value of the quarters is 55 cents greater than the …
  2. Math

    You have 84 coins, in dimes or nickles that equal $7.15, how many dimes and nickles
  3. 3rd grade

    My son has this Math word problem and I can come up with the answer but, I don't know how to explain to him how I got the answer. The problem is:Lauren has collected 150 nickles and dimes. She has 70 more nickles than dimes. How many …
  4. algebra help

    Solve the problem. Joe has a collection of nickels and dimes that is worth $6.00. If the number of dimes were doubled and the number of nickels were increased by 6, the value of the coins would be $9.90. How many dimes does he have?
  5. intermediate algebra

    joe has a collection of nickles and dimes that is worth $3.95. if the number of dimes was doubled and the number of nickles was increased by 21, the value of the coins would be $8.40. How many nickles and dimes does he have?
  6. Math

    marcus buys a juice from a juice machine. the juice is a bargain at .35 cents. the machine only accepts nickles, dimes and quarters. Marcus decides that each day he will place a different combination of coins into the juice machine. …
  7. algebra

    joe has a collection of nickles and dimes that is worth $6.10. If the number of dimes was tripled and the number of nickles was increased by 49, the value of coins would be $18.95.how many nickles and dimes does he have?
  8. Math

    Raul says he has equal numbers of dimes and quarters and four times as many nickles as dimes. The value of his nickles and dimes is 50 cents more than the value of his quarters. How many of each kind of coin does he have?
  9. Math

    Please check to see if I did this correctly. This is a 2 part math problem. 1. Janelle has d dimes and n nickles. Her sister has 5 times as many dimes and 6 times as many nickles as Janelle has. Write the sum of the number of coins …
  10. math 1

    you have 28 coins that are all nickles and dimes. the value of the coins is $2.05. Find the amount of nickles and dimes that you have.

More Similar Questions