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Solve this system of linear equations using any method you prefer



At Erica`s Sandwich Shop, two chicken sandwiches and four cheese 
sandwiches costs $18. Five chicken sandwiches and six cheese 
sandwiches cost $34. Which type of sandwich is more expensive 
and by how much?At 




                                                                    1
Solve this system of equations using substitution

x + y ­ z  = 2

x ­ 2y + z = ­1

3x + y ­ z = 4




                                                    2

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