For a three variable system of equations to be consistent, the equations formed by the equations must meet two conditions: 1  All three planes have to parallel. 2  Any two of the planes have to be parallel and the third must meet one of the planes at some point and the other at another point.
Osteoarthritis affects 20 million Americans, occurring most often in women and adults older than 45. Osteoarthritis can affect any joint, but it most often occurs in the knees, hips, spine and fingers. At first it may affect only one joint, but if the joint is in the fingers, multiple hand joints may become affected.
Rheumatoid arthritis attacks the joints with inflammation that causes pain, stiffness, limited movement and the eventual destruction of the joints. Rheumatoid arthritis can also affect blood vessels and other organs.In contrast, in osteoarthritis, joint pain and damage are due to a localized repeated injury and general wear and tear on the joint. There is no underlying generalized inflammatory process, and osteoarthritis does not affect other organs in the body.heumatoid arthritis can also affect blood vessels and other organs. In contrast, in osteoarthritis, joint pain and damage are due to a localized repeated injury and general wear and tear on the joint. There is no underlying generalized inflammatory process, and osteoarthritis does not affect other organs in the body.