Cramer''s rule to calculate the linear equations

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Question: Use Cramer's Rule to calculate the linear equations.  

1. 7x2 = 3
    2x1 + 4x2 = 1

2. 2x1 + x2 = 7
   -3x1 + x3 = -8
   x2 + 2x3 = -3

3.  4x1 + x2 = 6
    5x1 + 2x2 = 7

4. 3x1 - 2x2 = 7
   -5x1 + 6x2 = -5

Reference no: EM1314328

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