Question 1180566
<pre>
                |Price |
                | per  |Money |
        |Gallons|Gallon|Value |
-------------------------------
Grade A |   x   |17.60 |17.60x| 
Grade B |   y   |19.20 |19.20y|
Grade C |   x   |22.40 |22.40x|
-------------------------------
Mixture |  10   |19.52 |195.20|

Equations:

{{{system(x+y+x=10,17.60x+19.20y+22.40x=195.20)}}}

{{{system(2x+y=10,40.00x+19.20y=195.20)}}}

Solve by substitution or elimination.

Answer: 2 gallons each of grades A and C, and 6 gallons of grade B

Edwin</pre>