An Amazon driver drives two different routes:
the Red Route and the Yellow Route. The
routes are different lengths.
On Monday the driver traveled the Red
Route 3 times and the Yellow Route 4 times,
traveling a total of 72 miles.
. On Tuesday the driver traveled the Red
Route 6 times and the Yellow Route 7 times,
traveling a total of 139 miles.
What is the length of the Red Route in miles?