# SAT problem of the week, August 25, 2014 Solution

Hint for process of elimination: Since $y$ and $xy$ are both positive, $x$ is also positive. Therefore $y-x. This eliminates choice E, leaving you with four choices. Some awareness about how big or small the answer should be, for example noting that $x=8$, may help you eliminate choice D for being too big, and choice A for being too small.

Read on for a full solution

# SAT problem of the week, August 25, 2014

If $xy = 120$ and $y = 15$, then $y-x=$

Solutions, hints, and questions are welcomed. A full solution will be posted on the August 31st. If you would like to learn how to enter math formulas into this blog, visit the WordPress LaTeX tutorial page.