The equations 3x + 4y = 12 and 6x + 8y = 24 are to each other as which of the following pairs of equ

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A. x + y = 5 and 2x + 2y = 10

B. 2x + 3y = 6 and 4x + 6y = 12

C. x - y = 1 and 2x - 2y = 2

D. 5x + 5y = 15 and 10x + 10y = 30

E. None of the above

Answer: D. 5x + 5y = 15 and 10x + 10y = 30

Both pairs of equations are equivalent, representing the same line.

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