来自李言的问题
解方程组[5x-(1-11y)]/8=(5y-6x+2)/9=(3x+4y+7)/6
解方程组[5x-(1-11y)]/8=(5y-6x+2)/9=(3x+4y+7)/6
1回答
2020-05-15 11:51
解方程组[5x-(1-11y)]/8=(5y-6x+2)/9=(3x+4y+7)/6
解方程组[5x-(1-11y)]/8=(5y-6x+2)/9=(3x+4y+7)/6
(5y-6x+2)/9=(3x+4y+7)/6
10y-12x+4=9x+12y+21
21x+2y+17=0①
[5x-(1-11y)]/8=(3x+4y+7)/6
15x-3+33y=12x+16y+28
3x+17y-31=0②
①式-7*②式得
-117y+234=0
y=2
带入②式得
3x+34-31=0
x=-1