11 school days are left.
In the attached picture of a calendar, I marked the days the person has left. There are 11.
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The two sides of this equation are exactly the same, so the above equation holds for any value of x , <em>thus we have infinite solution for it.</em>
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Speed is 45 miles/1 hour.
135 miles x 1 hour/45 miles = 135/45=3 hours