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2x4y3z 3x2y5z

x=4,y=1 1ʽ x-y=3 2ʽ x+y=5 2ʽ-1ʽ y=1 2ʽ+1ʽ x=4 (2)2x+y=32 2x+y=0 -3/7, 22/7 0, 5 1, 1

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ã 3x-2y-5z=0 12x-8y-20z=0 1 2x-5y+4z=0 10x-25y+20z=0 2 1+2 22x-33y=0 22x=33y y=2/3x 3x-2y-5z=0 15x-10y-25z=0 3 2x-5y+4z=0 4x-10y+8z=0 4 3-4 11x-33z=0 11x=33z z=1/3x 3x^2+2y^2+5z^2/5x^2+y...

ⷽ飺 1 2 1 x=3,y=4,z=5 2 x=-1,y=,z=3

һ3x+2y+5z=2 x-2y-z=6 4x+2y-7z=30 3x+2y+5z=2 x-2y-z=6 4x+2y-7z=30 -3*ڵ 8y+8z=-16 4*-3*۵ 2y+41z=-82 -4*ݵ -156z=312 z=-2 zܣy=0 yz٣x=4 x=4 y=0 z=-2 2x-3y+z=11 3x+2y-4z=19 -x+y-...

x-2y+3z=3 (1) 2x+y+5z=8 (2) 3x-y-3z=-22 (3) (1)+(2)2 5x+13z=19 (4) (2)+(3) 5x+2z=-14 (5) (4)-(5) 11z=33 z=3 x=(19-13z)/5=-4 y=8-2x-5z=1

1.)x-2y+3z=4 2.)2x+y+4z=9 3.)3x-2y-z=-4 3-1,:x-2z=-4x=2z-4 x=2z-4 뷽2ͷ3Уã 8z+y=17 5z-2y=8 ̣ɵ z=2, y=1 ɴ˿ɵãx=2z-4=2*2-4=0 ɴ˿ɽ x=0y=1z=2

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