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 chronic inflammatory condition. Rheumatoid arthritis symptoms develop gradually and may include joint pain, stiffness, and swelling. The condition can affect many tissues throughout the body, but the joints are usually most severely affected.heumatoid arthritis is a chronic inflammatory condition. Rheumatoid arthritis symptoms develop gradually and may include joint pain, stiffness, and swelling. The condition can affect many tissues throughout the body, but the joints are usually most severely affected.