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Andre solved the equation 2x−9=10 In the following way. Why is Andre correct?
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Andre solved the equation 2x−9=10 In the following way. Why is Andre correct?

User Petar Tahchiev
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1 Answer

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X equals 9.5, when you add the 9 to the other side you get 19. When you divide 2 by 19 you get 9.5 making the solution correct.
User Leomar
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