: Isolating one variable and substituting it into the second equation.
: A "starred" (*) problem often involving parameters or absolute values. : Isolating one variable and substituting it into
: Using temporary variables to simplify complex structures. : Isolating one variable and substituting it into
: Finding intersections of curves (e.g., parabolas, circles, and lines) on a coordinate plane. : Isolating one variable and substituting it into
: Use variable replacement/substitution for higher-degree equations.
: Solve a system where one equation is linear and the other is quadratic. Addition/Elimination : Solve using algebraic addition.
: A motion or work-related problem requiring a system to solve.