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Two ordered pairs (x, y) and (a, b) are equal if and only if
Ax + y = a + b
Bx · y = a · b
Cx = b and y = a
Dx = a and y = b
Answer & Solution
Correct answer: D. x = a and y = b
Equality of ordered pairs requires corresponding components to be equal in order. Swapping the components changes the pair.
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