Question 1120729
Isabela has $2.55 in quarters,nickels and dimes. She has twice as many nickels as dimes and one less quarter than nickels. How many of each coin does she have?
<pre>There's absolutely NOTHING wrong with your post.
She has: {{{highlight_green(system(matrix(2,2, 4, dimes, 8, nickels), and, matrix(1,2, 7, quarters)))}}}   
You can do your own check!
BTW: You just need 1 (ONE) variable to solve for number of each coin. It's a lot easier and you're less prone to making errors!