Use Cramer's rule to solve the system of equations. Write your answer as an ordered pair. Example: (2, -4)

x - 2y = -9
3x + y = 1

Question

Use Cramer's rule to solve the system of equations. Write your answer as an ordered pair. Example: (2, -4)


x - 2y = -9
3x + y = 1

mathmate · Answer

@CamPayne Cramer's rule is fun, especially for 2x2's. If you have not yet been exposed to the method, go ahead and read: http://www.coolmath.com/algebra/14-determinants-cramers-rule/01-determinants-cramers-rule-2x2-01 If you already know it, proceed to solve until you get stuck. Post what you have.

campayne · Answer

i tried and it still aint working

retireed · Answer

What do you have so far?

campayne · Answer

(1, -6)

retireed · Answer

I think you mean 1 - (-6) or 7 for the bottom determinate.  Is that what you are trying to show?

campayne · Answer

well i put 7 also and the thing is not accepting  that answer either

retireed · Answer

No 7 is not the answer to the solution.  7 is the value of the bottom determinate.  You still need to find the answer to the upper determinate.  

It appears you don't understand how to use Cramer's Rule, so I suggest you go study on the link supplied by math mate.

campayne · Answer

i did! lol

retireed · Answer

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