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We have three methods.

1) Cramer's rule method (Or) Determinant method

2) Rank method

3) Matrix Inversion method.

see the text book of 12th standard mathematics in tamilnadu text book corporation.

My own question: For just 2 unknowns, do any of the above include the "ordinary" way in which you multiply one or the equations through so one of the unknowns match in both lines, subtract, solve the now-single difference for its unknown then substitute back? Or do the above only apply if you're solving great banks of equations simultaneously.

It's the only method I know but I recall being taught how to stretch it to 3 unknowns, but it becomes rather long-winded.

I ask out of curiosity because I "learnt" matrices without understanding them and with only the haziest hint that they have any uses!

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Q: Which method can be used to find the solution of linear simultaneous equations?
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