How to solve the system of equations that the number of variable is fewer than the number of equations. for example:

`x + y + 2z = 0,2x + y -z = 0.`

the result is

`x = 3t,y=-5t,z=t.(t is parameter)`

thanks you very much.

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How to solve the system of equations that the number of variable is fewer than the number of equations. for example:

`x + y + 2z = 0,2x + y -z = 0.`

the result is

`x = 3t,y=-5t,z=t.(t is parameter)`

thanks you very much.

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