Solve the system by substitution. If the system is inconsistent or has dependent equations, say so. x + y = 47x + 7y = 28
A. {(x, y)
}; dependent equations
B. ?; inconsistent system
C. {(0, 0)}
D. {(9, -5)}
Answer: A
Mathematics
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A. 
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A. Yes B. No
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A. 19
m2
B. 10
m2
C. 9
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