Final answer:
To solve the problem, set up an equation and isolate the variable 'x'. The number is 2.
Step-by-step explanation:
To solve this problem, we can set up an equation. Let's call the number you have 'x'. According to the problem, if you increase 'x' by 3 and then multiply the sum by 5, the result is 25. So, we can write the equation as 5(x + 3) = 25. To solve for 'x', we need to isolate it. First, divide both sides of the equation by 5 to get x + 3 = 5. Then, subtract 3 from both sides to get x = 2. Therefore, your number is 2.