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This document provides step-by-step instructions for solving a system of two equations using substitution. It gives the general form of two equations (1) and (2) in two variables, and then works through solving the specific system of equations x + 3y = 11 and 2x + y = 7. It outlines 6 steps: 1) isolate one variable in one equation, 2) substitute into the other equation, 3) solve the new equation for the isolated variable, 4) back-substitute to find the other variable, 5) test the solution, and 6) state the

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