AonZ
Simutaneosly solve
x5yz=13
2x+y+z=0
3x+y+2z=11



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AonZ
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I know how to solve 2 simutaneous equations but no idea about 3

AonZ
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i rather the elimination method :P

hartnn
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ok, so if i help you get 2 equations in x and y only , will you be able to solve the rest ?
1) Add 1st and 2nd equation, what u get ?

AonZ
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3x4y=13

AonZ
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i just need the steps in which to complete it i think

hartnn
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now multiply 1st equation by 2

AonZ
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6x8y=26

hartnn
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:O how ?

AonZ
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2x10y2z=26

hartnn
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now add it with 3rd equation.....

AonZ
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x9y=37
Btw does it matter if you add the 2nd to the 3rd eqution instead of 1st to 3rd?

hartnn
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if you add 2nd and 3rd equation, you could not have eliminated 'z'

hartnn
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now can you find 'x' and 'y' ?

AonZ
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y=4?

AonZ
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x=1

hartnn
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yes.

hartnn
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now can u find z ?

AonZ
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mhm... I sub x and y into the 1,2,3 equation?

AonZ
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ok z =6 thank you

hartnn
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yes, correct :) ask if any doubts.