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Step-by-step Answer
PAGE: 220SET: ExercisesPROBLEM: 4
Please look in your text book for this problem Statement

The system equations are

                 Equation (1)

                      Equation (2)

The matrix  equation form is .

When, .

Multiply each side by .

Therefore solution matrix is .

First find the determinant of  A = ad bc.

.

Therefore A-1 exists.

The inverse of A is .

Substitute a = 5, b = , c = 8, d = 5 and ad bc = 49.

.

Substitute the values of in the solution matrix .

Multiply each side by .

The solution is .



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