A number when decreased by 19. gives 59. Determine the number.

Answer

To solve the problem step by step, we can follow these instructions:

1. **Define the Variable**: Let the unknown number be represented by \( x \).

2. **Set Up the Equation**: According to the problem, when this number \( x \) is decreased by 19, it equals 59. We can write this as:
\[ x - 19 = 59 \]

3. **Isolate the Variable**: To find \( x \), we need to isolate it on one side of the equation. We can do this by adding 19 to both sides of the equation:
\[ x - 19 + 19 = 59 + 19 \]
This simplifies to:
\[ x = 59 + 19 \]

4. **Perform the Addition**: Now, we calculate \( 59 + 19 \):
\[ 59 + 19 = 78 \]

5. **Conclusion**: Therefore, the number is:
\[ x = 78 \]

### Final Answer:
The number is 78.