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# Pre-Calc (Matrices)

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Consider the system of equations.

2x+y=1

−3x+4y=15

How do you solve the system of equations with Cramer's rule?

I have the answers here (-1, 3), but I don't know how they got it... I've been trying to search on how they did, but it's all so confusing.

Oct 3, 2021

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I learnt Cramer's rule before I learn other methods but it is horrible.

I guess it is easy enough once you memorise all the steps but the steps make little sense to an ordinary person like me.

Matrices are brilliant for solving equations but Cramer's rule is far less intuitive than normal matrix elimination method.

Anyway.....

I suppose you have to learn Cramer's rule.

Here is a You Tube clip that is extremely well presented.

Oct 4, 2021
edited by Melody  Oct 4, 2021
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Alright, I'll give the link a try. I've been having a hard time with everything related to matrices, lol. I'm never gonna use it in my future anyways, thankfully.

DFO627  Oct 4, 2021
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I must report that the video really helped me understand! Thank you very much!

DFO627  Oct 4, 2021