Solving Systems by Substitution

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What is a system of equations?

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A system of equations is a set of two or more equations with the same variables. The solution is the point(s) where the equations intersect.

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What does it mean to solve a system of equations by substitution?

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Solving by substitution involves solving one equation for one variable and then substituting that expression into the other equation.

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How do you isolate a variable in an equation?

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To isolate a variable, perform inverse operations to get the variable alone on one side of the equation.

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The solution is (6, 9).

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The solution is (5, -2).

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The solution is (2, 3).