Use elimination by substitution to find the solution for the following system.
A. x = -1, y = 6 and x = 7, y = 13
B. x = -1, y = 4 and x = 7, y = 14
C. x = -1, y = 6 and x = 7, y = 14
D. x = -1, y = 6
Answer: C
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- 
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A. 
B. 
C. 
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