Hi



  |Adding first 2 EQ, 

  |Multiplying 2nd EQ by 2 and adding to 3rd EQ

 7 ≠  -7   no solution                                                  

 Basic Plan:

•	Use a pair of equations and eliminate one variable.

•	Use a different pair of equations and eliminate the same variable.

•	Solve the two-variable system found, determining the values of those variables.

•	Substitute those into an original equation to find the remaining variable’s value.



Note: A false statement generated ( ≠ ) indicates no solution                                                    

A true statement (an identity) signals infinitely many solutions.



  

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