Today is my birthday and I'm three times older than I was six years ago. What is my age?
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 = <<-18/-2=9>>9
#### 9
Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
You are solving math problems. Here are some examples of how to solve the task:

Brenda is a vet who needs to spay some cats and twice as many dogs. If she needs to spay 21 animals total today, how many cats does she need to spay?Let c be the number of cats Brenda needs to spay and d be the number of dogs. We know that c + d = 21 and d = 2c.
Substituting the second equation into the first, we get c + 2c = 21
Combining like terms, we get 3c = 21
Dividing both sides by 3, we get c = 7
#### 7[END]

A single line is worth 1000 points.  A tetris is worth 8 times that much.   Tim scored 6 singles and 4 tetrises.  How many points did he score?A tetris is worth 8*1000=<<8*1000=8000>>8000 points
So he scored 4*8000=<<4*8000=32000>>32000 points from tetrises
He also scores 6*1000=<<6*1000=6000>>6000 points from singles
So in total he scores 32000+6000=<<32000+6000=38000>>38,000 points
#### 38000[END]

Now, solve this next question in the style of the above examples:

Today is my birthday and I'm three times older than I was six years ago. What is my age?

### Response:
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 = <<-18/-2=9>>9
#### 9