Question 924455: If Erica has 3 more quarters than dimes and they have a combined value of 320 cents, how many of each coin does she have? Answer by TimothyLamb(4379) (Show Source):
You can put this solution on YOUR website! x = dimes
y = quarters
---
y = x + 3
10x + 25y = 320
---
put the system of linear equations into standard form
---
x - y = -3
10x + 25y = 320
---
copy and paste the above standard form linear equations in to this solver:
https://sooeet.com/math/system-of-linear-equations-solver.php
---
solution:
x = dimes = 7
y = quarters = 10
---
Solve and graph linear equations:
https://sooeet.com/math/linear-equation-solver.php
---
Solve quadratic equations, quadratic formula:
https://sooeet.com/math/quadratic-formula-solver.php
---
Solve systems of linear equations up to 6-equations 6-variables:
https://sooeet.com/math/system-of-linear-equations-solver.php
