Know if an ordered pair is a solution to a system of linear equations in two variables or not. Solve a system of linear equations in two variables by graphing. Solve a system of linear equations in two variables by the substitution method. Solve a system of linear equations in two variables by the elimination method. In this tutorial we will be specifically looking at systems that have two equations and two unknowns. Tutorial 20: Solving Systems of Linear Equations in Three Variables will cover systems that have three equations and three unknowns.
Medical Definition of rheumatic. : of, relating to, characteristic of, or affected with rheumatism rheumatic pain a rheumatic joint.
Rheumatology (Greek ÏÎµÏÎ¼Î±, rheuma, flowing current) is a sub-specialty in internal medicine, devoted to diagnosis and therapy of rheumatic diseases. Physicians who specialize in rheumatology are called rheumatologists. Rheumatologists deal mainly with clinical problems involving joints, soft tissues, autoimmune diseases, vasculitis, and heritable connective tissue disorders. Many of these diseases are now known to be disorders of the immune system. Rheumatology is increasingly the study of immunology. One of the major changes in modern rheumatology is the development of new drugs called biologics, or disease modifying agents, which can control severe disease more effectively.