2(x+0.6)=7(x-3.4)

2(x+0.6)=7(x-3.4) 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? (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+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 26.2-9X=8.24（X+2)=11.64X+0.5乘3=6.75X-3.3=7.31.7X-0.7X=20X-4.5+5.5=158X+5乘7=914.8X+3.4乘6.7=34.785.4X+0.6X=6.63.5（X乘7）=25.913.056除X+3.20.35乘X=8.898（X-3）-5X=275X+20==10024-16X=2.77.5乘6-5X=0.825X-16X=2.73.5乘C(X+50)=238X-12.6=8.4 *-----------------------------------------------*| 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 || 4.2-0.6x=3.6x 5x+2x=33.6 7x-4x=0.75 2x+7x+2.1=12 56x-32x-119=361 x+5=2x 3x+9=6x 4x-28=2x 2x+18=7x 5x=25*4-15x 7x-x+2*3=29.4 (28.8+5.5x+3.2）除2=71 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)=?