Pls help I will mark brainliest ​

How do you use the elimination method for this question? explain, because i really want to understand!

If, while training for a marathon, you ran 60 miles in 2/3 months, how many miles did you run each month? (assume you ran the same amount each month) write your answer as a whole number, proper fraction, or mixed number in simplest form. you ran __ miles each month.

Write the expression in complete factored form. 5n_(c - 3) - n(c - 3) =