en_tn_condensed/num/04/39.md

from thirty to fifty years old

"from 30 to 50 years old" (See: rc://en/ta/man/translate/translate-numbers)

everyone who would join the company

Here the word "would" does not mean that the men "chose" to join the company but rather that they were "assigned" to the company. AT: "everyone who was assigned to join the company" (See: rc://en/ta/man/translate/figs-explicit)

join the company to serve in the tent of meeting

The word "company" refers to the rest of the people working in the tent of meeting. See how you translated this phrase in Numbers 4:3.