The total number of trees in the orchard is two-fifths of pearls, and apples are three eighty. The rest of the trees are nine ceremonial. How many trees are in the set?

Correct answer:

n =  40

Step-by-step explanation:

2/5n + 3/8 n + 9 = n

2/5·n + 3/8·n + 9 = n

9n = 360

n = 360/9 = 40

n = 40

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