Answer
5 gallons of 10% and 15 gallons of 20%
Work Step by Step
17.5% needed, 10% and 20% available
20 gallons total
Let $x$ and $y$ represent the quantities of 10% and 20%, respectively.
$.1x+.2y=.175*20$
$x+y=20$
$.1x+.2y=3.5$
$x+y=20$
Please see the applicable matrices.
