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Published byTerence Harrison Modified over 4 years ago

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Solving Systems by Substitution (isolated) Solving Systems by Substitution (not isolated)

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Notes Solving a System of Equations by Substitution 1. Solve one of the equations for x or y. 2. Substitute your new expression from Step 1 into the other equation and solve for the variable. 3. Plug that solved variable into the other equation from Step 1 and solve for the other variable. 4. Check your answers by plugging it into the original equations. - Get x or y by itself.

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Notes Ex. Solve the system by substitution. 2) Substitute into other equation. 3) Plug in answer into other equation. 4) Check answer! 1) Solve for x or y. The variable x is already by itself.

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Notes Ex. Solve the system by substitution. 2) Substitute into other equation. 3) Plug in answer into other equation. 4) Check answer! 1) Solve for x or y. The variable y is already by itself. Now you try.

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Notes Ex. Solve the system by substitution. 2) Substitute into other equation. 3) Plug in answer into other equation. 4) Check answer! 1) Solve for x or y. The variable x is already by itself. Step 3 Now you try.

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Notes Ex. Solve the system by substitution. 2) Substitute into other equation. 3) Plug in answer into other equation. 4) Check answer! 1) Solve for x or y. The variable x is already by itself. Step 3

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Notes Ex. Solve the system by substitution. 2) Substitute into other equation. 3) Plug in answer into other equation. 4) Check answer! 1) Solve for x or y. Step 3

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Notes Ex. Solve the system by substitution. 2) Substitute into other equation. 3) Plug in answer into other equation. 4) Check answer! 1) Solve for x or y. Step 3 Now you try.

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Class Work Solve the system by substitution.

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Class Work Solve the system by substitution.

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