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_数学解答

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

人气：424 ℃　时间：2020-01-29 04:42:53

解答

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