## Standards derived from the same national standard

Solve systems of linear equations exactly and approximately (e.g., with graphs), focusing on pairs of linear equations in two variables.

Solve a system of two equations in two variables by using linear combinations; contrast situations in which use of linear combinations is more efficient with those in which substitution is more efficient.

Solve systems of linear equations with graphs, substitution and elimination, focusing on pairs of linear equations in two variables.

Solve systems of linear equations exactly and approximately, focusing on pairs of linear equations in two variables.

Solve systems of linear equations exactly and approximately (e.g., with graphs), focusing on pairs of linear equations in two variables.

Solve systems of linear equations exactly and approximately (e.g., with graphs), focusing on pairs of linear equations in two variables.