Write the system of equations that corresponds to the augmented matrix. 17-2 18 1 -8 x + y = -2 x + y = <-8 x + 7y= OA. O C. 18x + -2 y = -8 OB. O D. 7x + x + 7x + 18x + 18y = y = -2 -8 7y = -2 -8 18y =

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