human
Tim decides to do a movie marathon. The first movie is 2 hours long. The next movie is 50% longer. And the last movie is 1 hour shorter than the combined time of the previous 2 movies. How long was his movie marathon?
assistant
How long was the second movie? ** The second movie was 2*.5=<<2*.5=1>>1` hour longer than the first movie
How long was the second movie? ** So the second movie was 2+1=<<2+1=3>>3 hours long
How long were the first two movies? ** That means the first two movies had a combined time of 3+2=<<3+2=5>>5 hours
How long was the last movie? ** So the last movie had a length of 5-1=<<5-1=4>>4 hours
How long was his movie marathon? ** That means the marathon lasted 5+4=<<5+4=9>>9 hours
#### 9