This is a 14 question circuit on solving systems of equations by substitution. There are three levels, perfect for differentiation. Level A includes systems where most are already solved for one variable. Level B includes systems where some are solved for a variable and others need to be rearranged. Level C includes more challenge problems, where some are solved for a variable, some have a coefficient of one, and some have a coefficient of a number greater than one. In a math circuit, students