Yes you can. You are not "supporting" one side, you are trying to make one side equal to the other.
If we have two sinks filled with water, one hot and another cold, then we can focus on the cold side and warm it up until it gets hot, so it is equal to the other side. We can focus on the hot side and cool it down until it gets cold, too. Or we can heat one up and cool another one down, until they become equal.
Focusing on one side doesn't mean ignoring the other. Why some people have difficulty grasping this concept is beyond me.