Math 8th Grade
posted by Blakey .
I have a bunch of nickels and quarters worth $7.85 in my [pocket. How do I write a system of equation to solve and determine how many of each coin I have!!

5N + 25Q = 785
N + 5Q = 157
N = 157  5Q
Of course you cannot have a unique solution, since you don't have enough information to form a second equation.
But...
you said he has a bunch of nickels and quarters, so he has at least one of each
so let Q be a number form 1 to 25 to get different combinations
Q N  combination  value
1 152  1 quarter + 152 nickels = $7.85
2 147 2 quarters + 147 nickels = $7.85
...
25 32  25 quarters + 32 nickels = $7.85
Respond to this Question
Similar Questions

Math coin riddle need help please
I have 56 coins consisting of nickels and quarters. The total value of the coins is $5.60. How many of each coin do I have? 
6th grade math
We are learning probability and can you please check my answer. Question: Enrique has 3 dimes, 2 quarters, and 5 nickels in his pocket. He takes one coin from his pocket at random. What is the probability that the coin is either a … 
math
Corrine has 3 quarters, 7 dimes, 6 nickels, and 4 pennies in her pocket. If one coin falls out, what is the probability that it will not be worth more than $0.10? 
math
can someone help explain how to do this? allen has nickels dimes and quarters in his pocket. the number of nickels is 1 more than twice the number of quarters. the number of dimes is 1 less than the number of quarters. if the value 
math
Gary has 10 coins in his pocket. 2 quarters 5 dimes 3 nickels without looking, Gary pulls 1 coin from his pocket and puts it on a table. Then, he pulls one more coin from his pocket. What is the probability that the first coin is a … 
Math
"Jack has a collection of nickels and quarters. He has a total of 50 coins worth $10.30. How many of each coin does he have? 
Algebra
Solve the problem using matrices. John has a jarful of quarters and nickels. There are 84 coins in the jar. The value of the coins is $13.00. How many of each type of coin are there? 
Math
You have some quarters and some nickels in your pocket in total you have 7 coins and together they are worth 95 cents how many nickels and how many are quarters? 
math
Sam has 18 coins in his pocket that are either quarters or nickels. The total value of these coins is $3.90. Let q represent the number of quarters and n represent the number of nickels. The following system of equations represents … 
Algebra
Kyle has 13 coins in his pocket that are either quarters or nickels. He has $2.05 in his pocket in coins. Let q represent the number of quarters and n represent the number of nickels. The following system of equations represents this …