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Solve the system of equations using matrices. Use the Gaussian elimination method with​ back-substitution. {3a -...

Solve the system of equations using matrices. Use the Gaussian elimination method with​ back-substitution.

{3a - b -3c = 13

{2a - b + 5c = -5

{a + 2b - 5c = 10

Use the Gaussian elimination method to obtain the matrix in​ row-echelon form. Choose the correct answer below.

The solution set is {(_,_,_,_)}

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