Final answer:
To find the number, we can set up an equation using the given information and isolate the variable x. The number is 379.
Step-by-step explanation:
To find the number, we can set up an equation using the given information. Let's call the number x. The equation is: x - 243 = 136.
To isolate x, we can add 243 to both sides of the equation: x - 243 + 243 = 136 + 243.
Cancelling out the -243 and simplifying the right side gives us: x = 379.
Therefore, the number is 379.