If you are having a hard time getting started, try making a table.
Write equations for the situation. Use the table if you need help. Remember to define your variables.
y = the number of pages read
x = the time in minutes
Jimmica: y = 10x
Sam: Write a similar equation.
Solve your system of equations using the Equal Values Method.
Remember - there are only 300 pages in the book. Will Jimmica ever catch up to Sam?