You can conclude that X is smaller than Y. For example:
(2,5)
2 + 5 = 7
2 - 5 = -3
Hope this helped!
What is the question exactly? What is it you are trying to find?
What given data? It’s just lines, what’s the data before?
Try and get the variable by its self by -81 from both sides then divide it by 7 and get ur answer.
