Answer: -80
Step-by-step explanation: First, ignore the negative sign. Now you have the equation 4x__=320. This is where, because you don’t have the other value to be multiplied, you have to use INVERSE OPERATIONS and DIVIDE 320/4. This gives you the number 80 and you can find this using long division. Now 80 isn’t the answer quite yet because now we have to include the negative. A negative times a negative equals a positive, so therefore, the 80 we calculated beforehand has to be a -80.
You can check this answer by putting -80 into the equation. -4x80=320