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Solve the cramer’s rule x + y + z = 7  2x + 3y + 2z = 17

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Solve the cramer’s rule

x + y + z = 7 

2x + 3y + 2z = 17

4x + 9y + z = 37

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= 1(3 - 18) - 1(2 - 8) + 1(18 - 12) = - 15 + 6 + 6 = - 3

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