Short Answer 
To solve the expression, first subtract 15 from 7 to get -8, then multiply -8 by -2 resulting in 16, and finally divide 16 by 4 to arrive at the final answer of 4.
Step 1: Calculate the Value Inside the Brackets
Begin by simplifying the expression inside the brackets. For our expression, this means subtracting 15 from 7. The calculation is as follows:
- 7 – 15 = -8
This result will be used in the next step for multiplication.
Step 2: Multiply by Negative Two
Now, take the result from the first step and multiply it by -2. This step involves the following calculation:
- -2 * (-8) = 16
The product you get here, 16, is crucial for the final step.
Step 3: Divide the Result by Four
The final step is to divide the product obtained from the multiplication by 4. This is done with the following operation:
- 16 / 4 = 4
This gives you the final answer of 4, confirming that the value of the entire expression is indeed 4.