Solve by the substitution method.-0.5x - 0.1y = 1.40.5x - 0.3y = -1.8
A. {(0.3, 5.5)}
B. ?
C. {(-3.6, 3.3)}
D. {(-3, 1)}
Answer: D
Mathematics
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A. 
B. 
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D. 
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A. (2, 8]
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