Question
Mr. Pierre planted 18 trees in a row for his garden. The distance between each tree and the next was equal for all the trees. The distance between the first tree and the fourth tree was 12 m, what was the distance between the first tree and the ninth tree?
4 m

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Mr. Pierre planted 18 trees in a row for his garden. The distance between each tree and the next was equal for all the trees. The distance between the first tree and the fourth tree was 12 m, what was the distance between the first tree and the ninth tree?