3x+5y=4,5x-ky=0 求k

来源:学生作业帮助网 编辑:作业帮 时间:2024/04/30 22:06:24

3x+5y=4,5x-ky=0 求k
3x+5y=4,5x-ky=0 求k

3x+5y=4,5x-ky=0 求k
5x-ky=0 => 5x=ky
1:若 x = y ,则 k = 5
则 3x + 5y = 8x = 4
得 x = y = 0.5,k = 5
2:若 x = k,则 y = 5
则 3x + 25 = 4
得 x = k = -7,y = 5