document.write( "Question 897255: Have my basic equations for the problem but don't know what to do next...Any help will be greatly appreciated. \r
\n" ); document.write( "\n" ); document.write( "A cashier has a total of 30 bills consisting of ones, fives and twenties. The number of twenties is 6 less than the number of ones. The total value of money is $214. How many of each denomination of bill are there?\r
\n" ); document.write( "\n" ); document.write( "The equations I came up with are:
\n" ); document.write( "z=x-6
\n" ); document.write( "x+y+z=30
\n" ); document.write( "x+5y+20z=214
\n" ); document.write( "

Algebra.Com's Answer #544044 by josgarithmetic(39618)\"\" \"About 
You can put this solution on YOUR website!
Which way do you want to solve the system? A good but less advanced way is substitute for z in the other two equations and you will have a system of two equations in two linear variables x and y.\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "\"system%28x%2By%2Bx-6=30%2Cx%2B5y%2B20%28x-6%29=214%29\"\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "\"system%282x%2By=36%2Cx%2B5y%2B20x-120=214%29\"\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "\"system%282x%2By=36%2C21x%2B5y=334%29\"\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "Continue solving with that simpler system however you want.
\n" ); document.write( "
\n" );