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April 19, 2015

April 19, 2015

Posted by **Jon** on Tuesday, February 26, 2008 at 2:47pm.

a=3, b=-5, c=4, d=2, e=21, f=2

21(2)-(-5)(2) divided by 3(2)-(-5)(4)

=52/26= x=2

3(2)-21(4) divided by 3(2)-(-5)(4)

=78/26= y=3

answer:

(2,3)

- Math -
**drwls**, Tuesday, February 26, 2008 at 6:44pmIf you will "plug in" x = 2 and y=3 to either equation, you will see that your solution is incorrect.

Cramer's rule involves using the determinants of matrices. You do have the denominator determinant (26) correct. The numerator for y is wrong. It should be -78. y = -3

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