As you can see the solution to the system is the coordinates of the point where the two lines intersect. So, when solving linear systems with two variables we are really asking where the two lines will intersect. We will be looking at two methods for solving systems in this section.
Rheumatoid arthritis (RA) is an autoimmune disease in which the bodyâs immune system mistakenly attacks the membranes that line the bodyâs joints. The result is inflammation and pain in the joints.RA is a chronic disease that can cause periods of intense activity called flare-ups.esearchers have established that certain genetic markers may increase your risk of developing RA. The genes in question are related to the immune system in general, to chronic inflammation, or with RA in particular. It is important to note that not everyone with these markers develops RA.
RA is a common form of arthritis. (There are various other causes of arthritis and RA is just one cause.) About 1 in 100 people develop RA at some stage in their lives. It can happen to anyone. It is not an hereditary disease.he prognosis regarding joint damage is perhaps better than many people imagine: 1  About 2 in 10 people with rheumatoid arthritis (RA) have a relatively mild form of the disease, and can continue to do most normal activities for many years after the condition first starts.