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.
A Honor Society of Nursing (STTI) answered. Besides deterioration of cartilage between bones, osteoarthritis can affect the body in other ways. When the body tries to repair tissue damage in a particular joint, it will trigger the growth of bone, cartilage, and tissues. This growth actually can increase the size of the joint.