-540 + _____ = -847

To find the missing number in the equation -540 + _____ = -847, we can set the missing number as ( x ).

So the equation becomes:

(-540 + x = -847).

To isolate ( x ), we can add 540 to both sides:

( x = -847 + 540 ).

Now, calculate:

(-847 + 540 = -307).

So, the correct answer is ( x = -307 ), which corresponds to option D.

Keep up the good work, and if you have more questions, feel free to ask!