Problem:
Find the number from which 38937 must be subtracted to give 1520.

Solution:
To find the number from which 38937 must be subtracted to give 1520, we can set up the following equation:

x - 38937 = 1520

where x is the unknown number we are trying to find.

Now, we can solve this equation step by step to determine the value of x.

Step 1: Add 38937 to both sides of the equation to isolate x on one side.
x - 38937 + 38937 = 1520 + 38937
x = 40457

Therefore, the number from which 38937 must be subtracted to give 1520 is 40457.

Explanation:
To find the unknown number, we set up an equation where x represents the unknown number. By subtracting 38937 from x, we should get the result of 1520.

To isolate x on one side of the equation, we add 38937 to both sides. This cancels out the subtraction of 38937 on the left side, leaving us with x alone. On the right side, we have the sum of 1520 and 38937.

By simplifying the equation, we find that x is equal to 40457. Therefore, the number from which 38937 must be subtracted to give 1520 is 40457.

Summary:
The number from which 38937 must be subtracted to give 1520 is 40457. By setting up an equation and isolating the unknown number, we can find the solution step by step.