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27. Solve the linear system of equations using the substitution method.* y-x=5 7x-2y= 15 *This question is weighted four times as heavily as the

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27. Solve the linear system of equations using the substitution method.* y-x=5 7x-2y= 15 *This question is weighted four times as heavily as the other questions. In or partial credit for this question, use the space provided to justify your an x = 7, y = 12 x=-3, y= 18 x = 5, y = 10 x=-4, y=1

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