SPSU Math 1113: Precalculus Cheat Sheet
Solve Systems of Equations by Substitution 1. Solve 1 eqn for 1 variable in terms of others. 2. Substitute result in remaining eqns. 3. If have eqn in 1 variable, solve it, otherwise loop back to 1 above. 4. Solve remaining variables, if any, by substituting known values in remaining eqns. 5. Check soln in original system of eqns.
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