To solve this problem, we need to determine the value of x, which represents the additional marks that Danny scored compared to Larry.
Let's break down the information given:
Keith's score: 3
Larry's score: 3 times Keith's score = 3 * 3 = 9
Danny's score: Larry's score + x
Total score: Keith's score + Larry's score + Danny's score = 26
We can set up the equation as follows:
3 + 9 + (9 + x) = 26
Let's simplify and solve for x:
3 + 9 + 9 + x = 26
21 + x = 26
To isolate x, we subtract 21 from both sides of the equation:
21 + x - 21 = 26 - 21
x = 5
The value of x is 5.
#### 5
The answer is: 5
Below is a math problem. Provide a detailed, step-by-step solution.

### Problem:
Keith scored 3 points on the math test. Larry scored 3 times as many marks. Danny scored x more marks than Larry. Find the total amount of marks scored by the three students. The answer is 26.

### Answer:
