SOLUTION: Juan has .80 in nickels and dimes. He has twice as many nickels as dimes. How many nickels and how many dimes does he have?

Algebra ->  Customizable Word Problem Solvers  -> Coins -> SOLUTION: Juan has .80 in nickels and dimes. He has twice as many nickels as dimes. How many nickels and how many dimes does he have?      Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


   



Question 831701: Juan has .80 in nickels and dimes. He has twice as many nickels as dimes. How many nickels and how many dimes does he have?
Answer by TimothyLamb(4379) About Me  (Show Source):
You can put this solution on YOUR website!
---
5x + 10y = 80
x = 2y
---
put the system of linear equations into standard form:
---
5x + 10y = 80
x - 2y = 0
---
copy and paste the above linear system in standard form into this matrix-method solver:
https://sooeet.com/math/system-of-linear-equations-solver.php
---
solution:
x = nickels = 8
y = dimes = 4
---
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