It appears to be an expression without an operator between -2x and 25.
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2x + 5 = 25 2x = 20x = 10
(2x - 5)(2x + 5)
Multiples are not 5, 10, 15 20, 25. WRONG! It means like 1. Because, 1x25= 25. Therefore it is a multiple. 2x nothing= 25. 5x5= 25 MULTIPLE!
(2x - 5)(2x - 5)
If: 6/15 = 2x/25 Then: x = 5