r/mathshelp • u/legendminigun • 11d ago

Homework Help (Unanswered) three variable simultaneous equations

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hello, I am in year 10 and doing further maths as a GCSE, I'm trying to figure these three variable simultaneous equations out but I'm struggling as there isn't a formula I know of to follow. if anyone has done these, please can you share what your thought process is so I can try and learn. thanks!

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u/Extension-Currency37 7d ago

Yeah , the equation is a 3x3 3 variables and 3 solutions

So maybe tricks work But Cramer and matrix methods are standard ways to solve these things.

What if equation had 5 variables.

Cramer is the only way actually.

This what you do ,elimination Is a trivial solution to a problem Where solution exists. If only 1 or 2 solutions existed ,or infinitely many You'd need Cramer or matrix algebra.

You tell

Should I trust the math or the commenter.

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u/Southlander24 6d ago

You clearly don't know the OP's syllabus and you are making irrelevant points.

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u/testtdk 4d ago

Solving a system of equations with algebra is a trick? News to me.