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How does number 3 work, I don’t understand how it end up being x+8

How does number 3 work, I don’t understand how it end up being x+8-example-1
User Paul Ruiz
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The answer is -5 = x. Because if x + 8 is 3 you would have to subtract 5 making the answer to X negative 5 + 8.

User Rafael Sanches
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