Today is my birthday and I'm three times older than I was six years ago. What is my age? Let's think first. Chain of thought:
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.
Therefore, the answer is 9.