请帮我解一个方程写出每一步 2[100x+10(x+1)+2x]-49=200x+10(x+1)+x

分类: 作业答案 • 2022-05-23 12:08:46

问题描述：

答

2[100x+10x+10+2x]-49=200x+10x+10+x
224x+20-49=221x+10
3x=39
x=13

答

200x+20（x+1）+4x-49=200x+10x+10+x
200x+20x+20+4x-49=211x+10
224x-29-211x-10=0
13x=39
x=3

请帮我解一个方程 写出每一步 2[100x+10(x+1)+2x]-49=200x+10(x+1)+x