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{x+y+z=3,3x-y-4z=-2,2x+3y-2z=3 用代入法解三元.{x+y+z=3,3x-y-4z=-2,2x+3y-2z=3用代入法解三元.
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{x+y+z=3,3x-y-4z=-2,2x+3y-2z=3 用代入法解三元.
{x+y+z=3,3x-y-4z=-2,2x+3y-2z=3
用代入法解三元.
{x+y+z=3,3x-y-4z=-2,2x+3y-2z=3
用代入法解三元.
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