Example 2 Solve this system by using matrices. Multiply 2 times row 1 and –5 times row 2; then add: This matrix now represents the system Therefore, y = 1 Now, substitute 1 for y in the other equation and solve for x . Check the solution. The solution is x = 3, y = 1. Matrices are a more time-consuming method of solving systems of linear equations than either the
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