0.864 turn it into fraction HELPPP!

If jm equals 5x -8 and lm equals 2x -6 which expression represents jl

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.

Me find the value of x each figure.