#3 +1314 Yes, you raised two key points. One was that two halves of a fraction at negative make a positive overall fraction. This was a question I was wondering about but didn't state.
Second was that this is easy, but I was trying to fit to the equation x=c-b/a, and trying to get it to look like ax+-b=+-c. when doing so, I guess a and b, could be either number value or x term values, and it wouldn't matter. That is 2t+5t=15 would fit in the equation the same as 7+8=7t, a,b,c respectively to both terms.
Thanks again for a good explanation.
At melody. The post has been answered now and very well. I think there is not a real need to repost my comment. All that has been answered is enough that anyone who wants to conclude a way to work these problems can solve them, identify them and move on, irrelevant of my post. Which a repost imo would prove to messy up the thread a little.