1. Let the unknown number be \( x \).
2. According to the problem, we can write the equation: 2x + 8 = 5x - 1
3. Rearrange the equation to solve for \( x \): 2x + 8 - 2x = 5x - 1 - 2x , which simplifies to 8 = 3x - 1
4. Add 1 to both sides: 8 + 1 = 3x , which simplifies to 9 = 3x
5. Divide both sides by 3: x = \frac{9}{3}
6. Simplify: x = 3
Hence, the number is
x = 3