document.write( "Question 818791: A man has 10 gallons of a 50% sulphuric acid mixture, and 20 gallons of a 20% solution, and 5 gallons of a 10% solution. He wants to use up all the 10% solution and make 15 gallons of 30% solution. How much of each solution should he use? \n" ); document.write( "
Algebra.Com's Answer #492786 by TimothyLamb(4379)\"\" \"About 
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50x + 20y + 10z = 30(15)
\n" ); document.write( "50x + 20y + 10z = 450
\n" ); document.write( "---
\n" ); document.write( "z = 5
\n" ); document.write( "---
\n" ); document.write( "x + y + z = 15
\n" ); document.write( "---
\n" ); document.write( "system of linear equations:
\n" ); document.write( "50x + 20y + 10z = 450
\n" ); document.write( "x + y + z = 15
\n" ); document.write( "z = 5
\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( "Calculate and graph the linear regression of any data set:
\n" ); document.write( "https://sooeet.com/math/linear-regression.php
\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( "get result from solver:
\n" ); document.write( "x= 6.66666667
\n" ); document.write( "y= 3.33333333
\n" ); document.write( "z= 5
\n" ); document.write( "---
\n" ); document.write( "answer:
\n" ); document.write( "x= 6 + 2/3 gal 50% solution
\n" ); document.write( "y= 3 + 1/3 gal 20% solution
\n" ); document.write( "z= 5 gal 10% solution
\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( "Calculate and graph the linear regression of any data set:
\n" ); document.write( "https://sooeet.com/math/linear-regression.php
\n" ); document.write( "---
\n" ); document.write( "Solve systems of linear equations to 6-equations 6-variables:
\n" ); document.write( "https://sooeet.com/math/system-of-linear-equations-solver.php \n" ); document.write( "
\n" );