For decoration of a fir-tree prepared 40 Christmas decorations. Hung up 15 spheres and several garland. It was necessary to hang up 20 jewelry. How many garlands hung up on a fir-tree?

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In total-40 Spheres hung up - 15 Garlands hung up - Remained - 20 1) 20 + 15 = 35 (stayed together and hung up) 2) 40 - 35 = 5 (Garlands remained) to Answer: 5 garlands It seems so.
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Answer add