You are trying to solve x. So first, you have to find out what the opposite of adding 9 is. If you said, subtracting 9, you got it. So subtract 9 on both sides. So on the left side, it's now 0. 39 - 9 on the right side equals 26. So now, it should look like this: -2x=26. Now find the opposite of multiplying -2. It would be dividing -2. So divide -2 on both sides. So now, you have x on the left and -13 on the right. So that means, x = -13.
Hope this helps. :-)
