(300-x ) / (180-x)=4方程,

来源:学生学帮网 编辑:学帮网 时间:2024/05/26 23:34:34

(300-x ) / (180-x)=4
方程,

(300-x ) / (180-x)=4
x不能等于180.
300-x=4(180-x)
300-x=720-4x
3x=420
x=140

(300-x ) / (180-x)=4
300-x=4 (180-x)
300-x=720-4x
4x-x=720-300
3x=420
x=140