Mathematics, 28.06.2019 20:30 nickname0097
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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