Single-Sign Tube Puzzle

TRAVELING on the District Line, I spotted the following serial number on a carriage: 21485.
As usual, each number should be used once, and once only, and must be added, subtracted, multiplied or divided to make a balanced equation.

There is a single-sign solution, ie one that uses only one type of the four possible signs: + - x ÷.
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My solution: 2 + 8 = 1 + 4 + 5