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Use the method of Example 1 and the -decomposition
1.

   to solve the system

   Use the method of Example 1 and the -decomposition
2.

   to solve the system

In Exercises 3–10 find an -decomposition of the coefficient matrix; then use the method of Example 1 to solve the
system.
3.
4.
5.

6.

7.

8.

9.
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