The method of solving by substitution works by solving one of the equations (you choose which one) for one of the variables (you choose which one), and then plugging this back into the other equation, substituting for the chosen variable and solving for the other. Then you back-solve for the first variable.
Rheumatoid arthritis, an inflammation of the joints, is a disabling disease that can affect the appearance and the function of the hands and other parts of the body.It often deforms finger joints and forces the fingers into a bent position that hampers movement.The exact cause of rheumatoid arthritis is not known.heumatoid arthritis, an inflammation of the joints, is a disabling disease that can affect the appearance and the function of the hands and other parts of the body.
Rheumatoid arthritis is a systemic disease, meaning it can affect many parts of the body. For that matter, so can some of the drugs used to treat RA. Following is a listing by body part of the ways RA (and sometimes the drugs used to treat it) can affect you.hen RA-related inflammation of the blood vessels (called vasculitis) affects the skin, a rash of small red dots is the result. In more severe cases, vasculitis can cause skin ulcers on the legs or under the nails.