Use the substitution method or the elimination method to solve the system. If the system has infinitely many solutions, express the ordered pair in terms of x or y.5x + 7y = 225x + 2y = 42

A. ( -10, 5)
B. (-10, 7)
C. (-4, 10)
D. (10, -4)


Answer: D

Mathematics

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A.
B.
C.
D.

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Mathematics