✔ 最佳答案
Try to get x by itself by removing the 4 and the negative sign on the left hand side.
To do this, we want to use opposite operations.
For example, since you are "dividing" the 4 on the left hand side, you can get rid of it by "multiplying" by 4.
Also, since you are "multiplying" by -1 on the left hand side, you can get rid of it by "dividing" by -1.
You must perform these actions on BOTH sides to keep the equation balanced.
-x/4 = 12 (original)
4*(-x/4) = 4*12 (multiply 4 to both sides)
-x = 48 (notice that the 4's on the left hand side cancels)
(-x)/(-1) = 48/(-1) (divide by -1 on both sides)
x = -48 (notice that the negative 1's cancel)
Answer: x = -48