document.write( "Question 306030: Three acid solutions: 10%, 20%, 40%. How many ml of each to make 100ml of 18% solution if have to use four times as much of the 10% solution as the 40% solution.
\n" ); document.write( "x + y + z = 100; .1x + .2y + .4z = 100 x .18 = 18
\n" ); document.write( "Need to use matrix and graphing calculator, but only have two equations and three unknowns. Help! \n" ); document.write( "

Algebra.Com's Answer #219073 by richwmiller(17219) $\"\"$ $\"About$

You can put this solution on YOUR website!
.1*x+.2y+.4*z=100*.18
\n" ); document.write( "x+y+z=100
\n" ); document.write( "x=4z
\n" ); document.write( "three equations three unknowns
\n" ); document.write( "x=40 y=50 z=10 \n" ); document.write( "

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