1.25/47=0.75:x 8/x=2/5 0.6/19=1.5:x 3/4:5/12=x:2/1.25/47=0.75:x8/x=2/50.6/19=1.5:x3/4:5/12=x:2/30.75:x=1:7/51/2:x=1/6:2/5x:4.2=0.9/1.051/2:1/10=1/4:x3.7×5-2x=3/4x

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 x+2/x+1-x+4/x+3=x+6/x+5-x+8/x+7 x=? 解方程(x/x(x+2))+(x/(x+2)(x+4))+.+x/(x+8)(x+10)=1 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(x平方-6x-9)-x(x平方-8x-15)+2x(3-x)其中x=-六分之一 x^2+8x+ =(x+ )^2 x(x-4)=2-8x (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 3.268=3X()+2X()+6X()+8X() x/2+x/8+x/12+x/20=1 8x+3(x-2)=5x+(x-3) X-5+8*X=7*X-2*X-1 (5x-2)*(x+8)=5x*x+98 x-8/x-4=2-x-5/x-7 解方程】(x+8)/(x-3)-(x-9)/(x-4)=(x+7)/(x+8)-(x+2)/(x+3)(x+8)/(x-3)-(x-9)/(x-4)=(x+7)/(x+8)-(x+2)/(x+3)