x十y=91,z十y=63,z十x=46,求x,y,z

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x十y=91,z十y=63,z十x=46,求x,y,z
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x十y=91,z十y=63,z十x=46,求x,y,z
x十y=91,z十y=63,z十x=46,求x,y,z

x十y=91,z十y=63,z十x=46,求x,y,z
3式左右相加得
x+y+z=100由x+y=91,所以z=9,同样,x=37,y=54

满意留着啊

x=37y=54z=9

z=46-x
46-x+y=63
x=91-y
46-91+2y=63
-45+2y=63
2y=108
y=54
x=37
z=9

x+z+2y=154
2x+y+z=137
x-y=-17
x=y-17 2y=108 y=54 x=37 z=9

X=37
Y=54
Z=9

x37

由第二第三个等式得出:z=63-y=46-x,移项得到x-y=46-63=-17,然后y=x+17,带入第一个等式x+y=91=2x+17=91算出x=37,从而得出y=54,z=9

y=91-x y=63-z 91-x=63-z z=46-x x=37 y=54 z=9