At the beginning of the season, macdonald had to remove 5 orange trees from his farm. each of the remaining trees produced 210 oranges for a total harvest of 41790 oranges. write an equation to determine the initial number of orange trees (t) on macdonald's farm. at the beginning of the season, macdonald had to remove 5 orange trees from his farm. each of the remaining trees produced 210 oranges for a total harvest of 41790 oranges. write an equation to determine the initial number of orange trees (t) on macdonald's farm.' find the initial number of orange trees on macdonald's farm.