(7x-1)/0.024=(1-0.2x)/0.018-(5x+1)/0.012

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, 如果3x*x-x=1那么9x*x*x*x+12x*x*x-3x*x-7x+2001等于多少 *-----------------------------------------------*| 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 || x+2/x+1-x+4/x+3=x+6/x+5-x+8/x+7 x=? 已知3x*x-x=1,求6x*x*x+7x*x-5x+2000 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 (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 已知x除以（x*x-x+1）=7,求x*x除以（x*x*x*x+x*x+1）的值 (x-1)+(x+2)+0.2x+2x=46 X(X-1)=X 21分之10x÷3分之2=7分之3x-3分之1x-2分之1x=190x-53x=7408.5x-6.9x=43.3x-200=0.2x+1101.02+0.4x+2.6x=3.428.9x-67=4.5x+656x-58=3x+1410x-20=5x+806x+5=10x-3420-1.4x=9.8x-288.2x+5.4x=272 (x+7)(x+6)-(x-2)(x+1)=? (x-2)(x+1)(x+4)(x+7)=19 (x+7)(x+5)-(x+1)(x+5)=42 X-5+8*X=7*X-2*X-1 (x-7)(x+3)+(x-1)(x+5)=102 （x-7)(x+3)+(x-1)(x+5)=102