___________________ is replacing a variable with an expression it is equal to.

Equations that have the exact same solutions are ___________________.

A ___________________ is a mathematical or statistical representation of a problem from science, technology, engineering, work, or everyday life, used to solve problems and make decisions

Two or more inequalities that represent the constraints in the same situation form a ___________________.

___________________ is a method of solving a system of two equations in two variables where you add or subtract a multiple of one equation to another in order to get an equation with only one of the variables.

Two or more equations that represent the constraints in the same situation form a ___________________.

Two systems are called ___________________ if they share the exact same solution set.

A ___________________ is a limitation on the possible values of variables in a model, often expressed by an equation or inequality or by specifying that the value must be an integer.

The ___________________ can be represented by the points in the region where the graphs of the two inequalities overlap.

A coordinate pair that makes both equations in the system true is called a ___________________.