7. Systems of Equations & Matrices
Determinants and Cramer's Rule
7:27 minutes
Problem 79
Textbook Question
Textbook QuestionUse Cramer's rule to solve each system of equations. If D = 0, then use another method to determine the solution set. See Examples 5–7. -2x - 2y + 3z = 4 5x + 7y - z = 2 2x + 2y - 3z = -4
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