12x+20(x+03)=31.

来源:学生作业帮助网 编辑:作业帮 时间:2024/11/09 03:44:03

12x+20(x+03)=31.
12x+20(x+03)=31.

12x+20(x+03)=31.
03?0.
如果是0.3
则:
12x+20(x+03)=31.6
12X+20X+6=31.6
32X=25.6
X=25.6/32
X=0.8
如果是3
则:
12x+20(x+03)=31.6
12X+20X+60=31.6
32X=-28.4
X=-28.4/32
x=-7.1/8