x(1+0.8%)+(42-x)(1+1.1%)=42(1+1%),该题这一步(42-x)(1+1.1%)不知应怎样算?

x/x+(1-x)/x-1/x *-----------------------------------------------*| 6 4 X | 8 X X | X X 5 || X X X | X X X | X 7 8 || X X X | X X X | X X X ||---------------+---------------+--------------- || X X X | X X X | 5 1 X || X X X | X 6 X | X X X || 8 X X | 3 5 X | 2 X X || 填九宫格帮帮忙.x x 6 x x 7 x x 98 x x x 3 x 1 x x 9 x x 6 x 5 x 3 x x x 3 x x x x 1 8x x x 9 x 1 x x x2 1 x x x x 6 x x x 6 x 7 x 3 x x 1 x x 9 x 2 x x x 47 x x 8 x x 5 x x 七年级下册政治复习提纲(山东人民出版社)第五单元是 青春的脚步 青春的气息别弄错了啊!格式：X X X X X X X X X 1、X X X X X X X X X X.2、X X X X X X X X X.3、X X X X X X X X X X X. x-4/1x=8/3 x-0.8x=22 3/2x+2/1x=42x-4/1x=8/3 x-0.8x=22 3/2x+2/1x=42 (x+1)(x-1)(x-x+1)(x+x+1) x-4/1x=8/3 x-0.8x=22.3/2x+2/1x=42 分解因式----（X*X-X)(X*X-X-2)+1 (x+7)(x+5)-(x+1)(x+5)=42 1、|x-|3x+6||>42、|2x-|x-2|| X(X-1)=X 1.1/x|x/(x+1)| x/x-1[1+(x-1/x)] x-1/x÷(x-1/x) 】x(x+1)+x^2(x-1) 1/(1-x)+1/(1+x)+2/(1+x*x)+4/(1+x*x*x*x)+8/(1-x*x*x*x*x*x*x*x)怎么做 解方程((13x-x^2)/(x+1))(x+(13-x)/(x+1))=42 (13x-x^2)/(x+1)[x+(13-x)/(x+1)]=42