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12y ago

5 - X - X = - 1

5 - 2X = - 1

subtract 5 from both sides

- 2X = - 6

divide both sides integers by - 2

X = 3

=======check in original equation

5 - 3 - 3 = - 1

- 1 = - 1

=======checks

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Q: What is x when 5 - x - x equals -1?
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