The first method for solving a system is substitution: we isolate one unknown in one equation and substitute it into the others, gradually reducing the number of unknowns. Here we define what a system of equations is and see the method in action.
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The first method for solving a system is substitution: we isolate one unknown in one equation and substitute it into the others, gradually reducing the number of unknowns. Here we define what a system of equations is and see the method in action.