Craimer's rule

First, you must prepare a fraction for both the x and y

Second, the matrix for the denominator for both the x and the y are the same

Example

X1 Y1

X2 Y2

Third, you should find the numerator of both the x and the y, and this time, they're not the same.

x + 2y + 3z = -5

3x + y - 3z = 4

-3x +4y + 7z = -7

To find the numerator of the x, for the first column of the matrix, place the numbers the come after the "=" sign, and for the second column, place the numbers with y/before the "=" sign.

To find the numerator of the y, the first column will be the numbers with x, while the second column will contain numbers that arrive after the "=" sign.

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Fourth, simplify the fractions of both x and y and find the final answer

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The answer for (x, y, z) is (−4, 2, 1).

By

Amal Alanazi

Sarah Alsaeed

11A