To complete the equation \(-3 = -7\), we need to recognize that as it stands, this statement is false. The left side of the equation (−3) does not equal the right side (−7).
If you want to find a way to make it true, you would need to adjust either side of the equation. For example, you could change the right side to make both sides equal:
\(-3 = -3\)
If you're looking for a different operation or scenario involving these numbers, please provide more context!