PAGE: 379 SET: Exercises PROBLEM: 7

The system of equations are .

To write the augmented matrix,

Place the coefficients of the equations and the constant terms in to matrix.

.

To make the first element in the second () row a 0, subtract the rows from each other, the result to row 2 ().

(The result is placed in row 2)

To make the second element in the second () row a 1, multiply the second () row by .

(The result is placed in row 2)

To make the second element in the first () row a 0, subtract the rows from each other.

(The result is placed in row 1)

The first row will give you the solution for .

The second row will give you the solution for .

The solution is  .

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