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Systems of Equations Summary. Solve for one variable in at least one equation, if necessary. Step 1. Substitute the resulting expression into the other equation. Solve that equation to get the value of the first variable. Substitute that value into one of the original equations and solve. - PowerPoint PPT Presentation

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Page 1: Systems of Equations Summary

Systems of EquationsSummary

Page 2: Systems of Equations Summary
Page 3: Systems of Equations Summary

Solving Systems of Equations by Substitution

Step 2

Step 3

Step 4

Step 5

Step 1Solve for one variable in at least one equation, if necessary.

Substitute the resulting expression into the other equation.

Solve that equation to get the value of the first variable.

Substitute that value into one of the original equations and solve.

Write the values from steps 3 and 4 as an ordered pair, (x, y), and check.

Page 4: Systems of Equations Summary

Solving Systems of Equations by Elimination

Step 1 Write the system so that like terms are aligned.

Step 2 Eliminate one of the variables and solve for the other variable.

Step 3Substitute the value of the variable into one of the original equations and solve for the other variable.

Step 4Write the answers from Steps 2 and 3 as an ordered pair, (x, y), and check.


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