5X=35×[8-X] 咋解?

5X=35×[8-X] 咋解? x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少? 8(5+x)=13x 咋解 (x+12)(x-2)+(x+7)(x+8)-(x+5)(x-10),其中x=2 x-4/x-5 - x-5/x-6=x-7/x-8 - x-8/x-9求x=? (x+7/x+6) +(x+9/x+8)=9x=(x+10/x+9) +(x+6/x+5) x+2/x+1-x+4/x+3=x+6/x+5-x+8/x+7 x=? 3x+5x=8x. 8x-5x=()x 8x(x-5)=3x (x+8)(x+6)(x+7)+(x+5)(x+6)(x+7)=(x+5)(x+8)(x+7)+(x+5)(x+8)(x+6) 11x+0.5=15x-0.7 5x+12=8x+35x+14=7x-4 （X+5)*(X+5)-X=X咋解 *-----------------------------------------------*| 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 || 如果X+X+8=35-X,那么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 (5x-2)*(x+8)=5x*x+98 8x+3(x-2)=5x+(x-3)