If possible, solve each system by an algebraic method (substitution or addition method). Otherwise, state that the problem has no solution or an infinite number of solutions.x + y = 4 x - y = -4

A. (3, 9)
B. (4, 8)
C. (-4, 9)
D. (8, 4)


Answer: B

Mathematics

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A.

B.

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D.

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