This math topic focuses on solving systems of linear equations by substitution. It involves substituting one equation into another to form a single equation that can be solved for one variable. The problems provided require substituting a given expression into another equation and simplifying to solve for the unknown variable. This includes determining the correct simplified form from multiple answer choices. These exercises practice algebraic manipulation skills and help in understanding how to isolate variables to find specific solutions in linear equation systems.

Work on practice problems directly here, or download the printable pdf worksheet to practice offline.