Answer:
4
Explanation:
Divide -3 on both sides so that x is by itself
-3x = -12
-3 -3
-3 is cancelled out
-12 divided my -3 is 4
Since both numbers are negative it would end up positive.
If the numbers are both positive then it would be positive as well.
And if one number is positive and the other is negative then the answer would be negative.
The answer would be: 4
I hope it helps! Have a great day!