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manmanmanboyman
The answer should be -9. It's the only way to get a high number from subtraction (a double negative)
Jethero
All you have to do to solve this question is to swap the -x and 24. It is of utmost importance that you do NOT forget to switch the signs of the moving values. You should end up with something looking a little bit like this.
15-x = 24
15 - 24 = x
-9=x

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