(3X)÷3+4.5-(2.8-5X)÷0.2=0
1.25-x=2.8 2.36÷x+9=0 3.33x=79-x 4.5x-(11-7)=x+3 5.169÷(x+9)
已知x²+3x-1=0 求(x-3)÷(3x²-6x)÷(x+2-[5÷(x-2)])的值
若x²+3x-1/3=0 则代数式x-3/3x²-6x÷(x+2-5/x-2)的值
1.若x^2+3x-1=0,则x-3/3x^2-6x÷(x+2 - 5/x-2)=________.
已知(x-根号2+1)(x-2)=0,求代数式[(x-1)/(x-3)-(x-4)/x]÷(x^2+x-6)/(x^2+
已知x²+3x-1=0,求(x-3)/(3x²-6x)÷(x+2-5/(x+2))的值
用递归法求y=x-(x*x*x/3!)+(x*x*x*x*x/5!)-(x*x*x*x*x*x*x/7!)+.
5(x²-x)-3(x²+x)=0
解方程:8x -4.5÷0.2=16 3(x+30)=6x+30 3-(5-2x)=x+2
已知1+x+x^2+x^3=0,求x+x^2+x^3+x^4+x^5+x^6+x^7+x^8的值
x+3/x+1-x+5/x+3-x+7/x+5+x+9/x+7=0
已知(x+根号二)/(x-2)÷(x²+4x+4)/(x²-4),其中x满足(x-2)(x+3)=0