In Exercises 7176, write each system in the form AX = B. Then solve the system by
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In Exercises 71–76, write each system in the form AX = B. Then solve the system by entering A and B into your graphing utility and computing A-1 B.
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y +z = -6 X 4x + 2y + z = 4x - 2y + z 9 2y + z = -3
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