SOLUTION: Norma saved nickels and dimes the first 50 coins she saved were worth 3.90 how many of each type had she saved

Question 826980: Norma saved nickels and dimes the first 50 coins she saved were worth 3.90 how many of each type had she saved

Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Norma saved nickels and dimes the first 50 coins she saved were worth 3.90 how many of each type had she saved
--------
Quantity Eq:: n + d = 50 coins
Value Eq:: 5n+10d = 390 cents
------------------------------------
Modify for elimination:
n + d = 50
n + 2d= 78
------
Subtract and solve for "d":
d = 28 (# of dimes)
----
Solve for "n"::
n + d = 50
n + 28 = 50
n = 22 (# of nickels)
========================
Cheers,
Stan H.
---------------
RELATED QUESTIONS
Mary has a piggy bank in which she has saved only dimes and quarters. She has 17 coins in (answered by CubeyThePenguin)

kate saved some money. she saved 20-cent and 50-cent coins only. she had the same... (answered by josmiceli)

Marysia has saved $48.75 in nickels and loonies. If she has 3 nickels fewer than three (answered by josmiceli,ikleyn)

Maryia has saved $63.5in dimes and loonies.if she has 5 dimes fewer than two thirds the... (answered by Boreal)

Maryia has saved $63.5in dimes and loonies.if she has 5 dimes fewer than two thirds the... (answered by Boreal,solver91311)

Debra saved only dimes and nickles. When she last countes the coins, she noticed there... (answered by macston)

One boy saved pennies, another saved nickels, and another dimes. If each one of them had... (answered by ankor@dixie-net.com)

Kate saved some money. she saved 20 cent and 50 cent only. she had the same number 0f 20... (answered by JulietG)

Micky and Yarberry saved nickels and dimes. They had a total of 34 coins whose value was... (answered by math_tutor2020,josgarithmetic,MathTherapy,greenestamps)