Today is my birthday and I'm three times older than I was six years ago. What is my age? Think carefully first, then make a decision:
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We know that my age divided by three is equal to my age minus six therefore X / 3 = X - 6 where X = My age. This means that X = 3X - 18 because we can multiply both sides by 3. This also means that - 2X = - 18 because we can subtract 3X from the right side. Therefore X = 9 because - 18 / - 2 = 9. So, the answer is 9.
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