Question 1187030

"Priscilla and Martha sold girl scout cookies. Priscilla’s sales were $25 more than three times of Martha’s. Altogether, their sales were $393. How much did each girl sell?" I'm not sure how to solve this.
<pre>You'll NEVER find the right answer with that dude's equations. One/both DOESN'T/DON'T fit the description. 
Therefore, {{{cross(system(p-m=25,p+m=393))}}}