(80-x)2/7=40-x
来源:学生作业帮助网 编辑:作业帮 时间:2024/08/31 20:31:35
![(80-x)2/7=40-x](/uploads/image/z/170201-65-1.jpg?t=%EF%BC%8880-x%292%2F7%3D40-x)
x){@BHȰI*/!RX@\רYeD`
[\72/.H̳ycɋ};Ny6}ۓ3^je }O/{6"Y-5ԼBA/)
2HU)(@`f5 \ n1
(80-x)2/7=40-x
(80-x)2/7=40-x
(80-x)2/7=40-x
(80-x)2/7=40-x
160/7-2x/7=40-x
x-2x/7=40-160/7
5x/7=120/7
x=120/7*7/5
x=24
两边同时乘以7 然后左有同时拆括号 160-2x=280-7x 移项后 左边5x=280-160 x=120/5 x=24
(80-x)2/7=40-x
x/x-2+x-9/x-7=x+1/x-1+x-8/x-6,
x/x-2+x-9/x-7=x+1/x-1+x-8/x-6,
x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?
解分式方程:1/X-2+1/X-6=1/X-7+1/X-11/X-2+1/X-6=1/X-7+1/X-11/(x-2)-1/(x-1)=1/(x-7)-1/(x-6)(x-1-x+2)/(x-2)(x-1)=(x-6-x+7)/(x-7)(x-6)1/(x-2)(x-1)=1/(x-7)(x-6)(x-2)(x-1)=(x-7)(x-6)x^2-3x+2=x^2-13x+4213x-3x=42-210x=40x=4 为什么要移向才能解
(x+12)(x-2)+(x+7)(x+8)-(x+5)(x-10),其中x=2
2x+3x+4x+5x+x+6x+7x=100
x+2/x+1-x+4/x+3=x+6/x+5-x+8/x+7 x=?
x+40=2x x=?
(x+1)/(x+2)+(x+8)/(x+9)解答x+1/x+2+x+8/x+9=x+2/x+3+x+7/x+8
*-----------------------------------------------*| 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
7x^2-5x=2x^2+x
x-2/3x+x+2/7x=30
27046=2x( )+7x( )+4x( )+6x( )
47026=4x()+7x()+2x()+6x()
2706=2x( )+7x( )+4x( )+6x( )
(x+7)(x+6)-(x-2)(x+1)=?