document.write( "Question 925694: On monday Harold picked up 6 donuts and 4 large coffee for the office staff, He paid $6.90. On tuesday Melina picked up 3 donuts and 6 large coffees for the office staff. She paid $6.69. What is the cost of the one donut? What is the cost of one large coffee? \n" ); document.write( "
Algebra.Com's Answer #561696 by TimothyLamb(4379)\"\" \"About 
You can put this solution on YOUR website!
x = cost of doughnut
\n" ); document.write( "y = cost of coffee
\n" ); document.write( "---
\n" ); document.write( "6x + 4y = 6.90
\n" ); document.write( "3x + 6y = 6.69
\n" ); document.write( "---
\n" ); document.write( "put the system of linear equations into standard form
\n" ); document.write( "---
\n" ); document.write( "6x + 4y = 6.90
\n" ); document.write( "3x + 6y = 6.69
\n" ); document.write( "---
\n" ); document.write( "copy and paste the above standard form linear equations in to this solver:
\n" ); document.write( "https://sooeet.com/math/system-of-linear-equations-solver.php
\n" ); document.write( "---
\n" ); document.write( "solution:
\n" ); document.write( "x = cost of doughnut = 0.61
\n" ); document.write( "y = cost of coffee = 0.81
\n" ); document.write( "---
\n" ); document.write( "Solve and graph linear equations:
\n" ); document.write( "https://sooeet.com/math/linear-equation-solver.php
\n" ); document.write( "---
\n" ); document.write( "Solve quadratic equations, quadratic formula:
\n" ); document.write( "https://sooeet.com/math/quadratic-formula-solver.php
\n" ); document.write( "---
\n" ); document.write( "Solve systems of linear equations up to 6-equations 6-variables:
\n" ); document.write( "https://sooeet.com/math/system-of-linear-equations-solver.php \n" ); document.write( "
\n" );