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7.3 Solving Systems of Equations by Elimination Using Multiplication

7.3 Solving Systems of Equations by Elimination Using Multiplication. 1. Solve by Elimination. 2. Exa mple Problems. 3. Practice Problems. Multiply, Then Use Elimination.

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7.3 Solving Systems of Equations by Elimination Using Multiplication

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  1. 7.3 Solving Systems of Equations by Elimination Using Multiplication 1 Solve by Elimination 2 Example Problems 3 Practice Problems

  2. Multiply, Then Use Elimination • If the coefficients of either variable in the first equation DO NOT match the corresponding coefficients in the second equation: • Multiply one equation by a number that will make one of the coefficients of a variable match in both equations • Follow the elimination steps

  3. Multiply, Then Use Elimination Example

  4. Multiply, Then Use Elimination Example (Cont.)

  5. Another Example • An untrue solution identifies and Inconsistent System • That means the lines won’t cross… 

  6. Practice Problems • Page 391 Problems 13-39 (odd)

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