3. Consider the linear system 2x1 + 4x2 -12, 4x1 + 5x2 = 24. = (a) Using the formula for the inverse of a 2 x 2 matrix, find the inverse of the matrix 24 - (²3) 4 5 And then, use A-¹ to find the unique solution of the linear system above. A = (b) Solve the above linear system using Cramer's rule instead.

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A: We can answer the question as below.

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A: We will solve the problem.

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