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have u learnt Cramer's rule?

or the matrix method?

then which method would u adopt for the solution?

we can reduce the equations into two variables n two equtations

would I need to set the equations equal to zero and factor?

no u have to eliminate one variable, then solving them simultaneously

like, we can choose eq 1 and 2 n eliminate x,say

likewise we can select eq 2 n three, again eliminate x

we get a et of two eqs in 2 variables

got it?or u need the solution?

Can you show me the steps? That would help me a lot.

I am studying for my final and this is a practice problem I am doing, I just can't figure it out.

right?

similarly multiplying eq 2 by 3 and subtracting 2 and 3

3x+12y-9z=-69
3x-y+2z=14
---------------
-13y-11z=-83

is it ok?

yes, Thank you.

2x+3y+z=-3
2x+8y-6z=-46
---------------
-5y+7z=-43

i missed the multiplication by 2 first :(