So to find the answer to this, you have to consider that - half because half the pocket money (x) was spend on clothes, then plus 9 because that's how much extra she gained and 13 because that was the result of all the changes.
To solve this, first subtract 9 from both side, which leaves you with and is the same as , so to solve this, multiply both sides of the equation by two, resulting in . SO from this we can conclude that the weekly allowance is $8
Examples of benchmarks are: 1/2, 1/4,1, 0. These are just a few examples of benchmarks. I hope this helps. Remember benchmarks are numbers that you can use on a number line as a guideline. Mark as brainliest! :)