Mathematics, 18.11.2020 23:00, ladybee05

Select the correct answer. Which equation combines with the given equation to form a system of equations with the solution x = 3 and y = 9? x + 2y = 21 A. 4x + 6y = 64 B. 2x + y = 36 C. 4x + y = 21 D. -3x + 4y = 33 E. 3x + 2y = 28

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Select the correct answer. Which equation combines with the given equation to form a system of equat...