{█(x+y-z=0@2x+3y-4z=-3@x-2y+3z=5)┤?

👨🏻‍🏫 學術台數學

[匿名]

2018-01-31 9:23 am

回答 (1)

螞蟻雄兵

2018-01-31 12:38 pm

Sol
x+y－z=0
x=z－y
2x+3y－4z=－3
2(z－y)+3y－4z=－3
Y－2z=－3
y=2z－3
x－2y+3z=5
(z－y)－2y+3z=5
－3y+4z=5
－3(2z－3)+4z=5
－2z+9=5
z=2
y=4－3=1
x=2－1=1

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