Solve the system of equations using substitution.
A. x = -8, y = 7; x = -7, y = 8
B. x = 8, y = -7; x = 7, y = -8
C. x = 8, y = 7; x = 7, y = 8
D. x = -8, y = -7; x = -7, y = -8
Answer: C
Mathematics
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