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.
rheumatism. 1  any disorder of the connective tissue structures of the body, especially those in the back or the extremities, characterized by pain or stiffness. 2  Any painful state in bones, ligaments, joints, tendons, or muscles. 3  a disease which causes stiffness and pain in one's joints.