Question 240474
Hello, 
Let's first set up where x will show the number of high tops. 2x will represent the number of running shoes. Now we can set up and equation:
x+2x=144   Combine like terms
3x=144  Divide both sides by 3
x=48 
This shoes us that 48 high tops will be sold and 96 Running shoes will be sold. 
RJ Toftness
www.math-unlock.com