A desert has 3/5 fewer palm trees than a nearby forest, which has 5000 palm trees. How many palm trees are there in both the desert and the forest combined? Let's think first. Chain of thought:
The desert has 3 / 5 fewer palm trees than the forest, and since the forest has 5000 palm trees, the desert has 3 / 5 * 5000 = 3000 fewer palm trees. The total number of palm trees in the desert is 5000 - 3000 = 2000. Together, the desert and the forest have a total of 5000 + 2000 = 7000 palm trees.
Therefore, the answer is 7000.