Solve the system of equations using substitution.
A. x = 
, y = 
; x = 1, y = 5
or 
, (1, 5)
B. x = 
, y = 6; x = - 
, y = 
or 
), 
C. x = - 
, y = 2; x = 1, y = 5
or 
, (1, 5)
D. x = 
, y = 
; x = - 
, y = 0
or 
, 
Answer: B
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