7 3 solving systems of equations by elimination using multiplication
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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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7.3 Solving Systems of Equations by Elimination Using Multiplication

1

Solve by Elimination

2

Example Problems

3

Practice Problems


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


Multiply, Then Use Elimination Example


Multiply, Then Use Elimination Example (Cont.)


Another Example

  • An untrue solution identifies and Inconsistent System

  • That means the lines won’t cross… 


Practice Problems

  • Page 391

    Problems 13-39 (odd)


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