## Elementary and Intermediate Algebra: Concepts & Applications (6th Edition)

We use $x$ to represent the amount he got during his first stop. Doing this, it follows: $$x+2x=19.2 \\ 3x=19.2 \\ x=6.4$$ Thus, during the second stop, he got: $$=6.4\times 2 = 12.8\ Gallons$$