7.8÷X=1.3×2

7.8÷X=1.3×2 化简 [3x/(x+2)-x/(x=2)]÷x/(x^2-4)化简 [3x/(x+2)-x/(x-2)]÷x/(x^2-4 7.8x÷36＝20.7.8x-4x=2x+3.6 x+8.8=22.4 x÷3.8=6.84 1.3x+2=28 9x-3x=16.8 设f(x)=x+2÷x(x (x²-x+1)÷(x²-x-1)=(x²+x)÷(x²+x-2)解方程 X^2-3X-2=0,求( x - 2x-1/x )÷(x-1)/(x^2-2x) 1.3x+2/x²-x-2+(1-1/x+1)÷（1+1/x-1）,其中x=32.x²-1/x²-2x+1+x²-2x/x-2÷x,其中x=1/2 2x^2-4x/x+2`x^2+2x/x^2-4x+4÷x/3x-6,其中x=根号3/2 2x^2-4x/x+2`x^2+2x/x^2-4x+4÷x/3x-6,其中x=根号3/2 x(2-1/x)+x/(x^2-2x)÷(3-x)/(x^2-4)2.2/3+x/(3x-1)=1/9x-3 x-0.25x=2.8+0.2解放程1.26-2x=0.74 1.3x+1.5x=0.14 x÷8=0.06 3道简单的分式方程,1.3/(1-x^) = 2/(1+2x+x) - 5/1-2x+x^2.5x/(x^+x-6) + (2x-5)/(x^-x-12) = (7x-10)/(x^-6x+8)3.(x+1)/(x+2) + (x+6)/(x+7) = (x+2)/(x+3) + (x+5)/(x+6) 先化简再求值[3x/(x+2)-x/(x-2)]÷2x/(x^2-4)x=2010 化简求值：(3x/x+2-x/x-2)÷2x/x^2-4,x=-3 x^2-1/x^2+x÷(x-2x-1/x),其中x=√2+1, x÷0.8=6×1.6 45÷x=2.5×2 3.6x-x=1.3×4x÷0.8=6×1.6 45÷x=2.5×2 3.6x-x=1.3×4 先化简再求值(x/x-2-x/x+2)÷4x/x-2,其中x=1