Solve by the substitution method.9x + 9y = -9-6x + 4y = 6
A. {(-1, 0)}
B. {(x, y)|-6x + 4y = 6}
C. ?
D. {(-2, 1)}
Answer: A
Mathematics
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A. 
B. 58
C. 
D. 
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A. a-18 + 18a-16 + 288a-14 + 672a-12 + . . . B. a-18 + 18a-16 + 144a-14 + 672a-12 + . . . C. a-18 + 18a-16 + 288a-14 + 1344a-12 + . . . D. a-18 + 18a-16 + 144a-14 + 1344a-12 + . . .
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A. -? < x < ? B. x < 3 C. 1 < x < 3 D. 1 ? x < 3
Mathematics