13-2X+9X=33.3解方程.
13-2X+9X=33.3解方程.
解方程((13x-x^2)/(x+1))(x+(13-x)/(x+1))=42
解方程:(x-2)(x^2-6x-9)=x(x-5)(x-3)
x-2/x+3=3-2x²-13/x²-9 解分式方程
2/(x-14)-5/(x-13)=2/(x-9)-5/(x-11)解方程
解方程:2x(x-9x)+16=0
9x^2+6x=5x解方程
解方程 5x+6x-9=2x
解方程:(x+3)/(x+2)-(x+5)/(x+4)=(x+7)/(x+6)-(x+9)/(x+8)
解方程】(x+8)/(x-3)-(x-9)/(x-4)=(x+7)/(x+8)-(x+2)/(x+3)
解方程:(x-8)/(x-3)-(x-9)/(x-4)=(x+7)/(x+8)-(x+2)/(x+3)
解方程(x-2)X(x的平方-6x-9)=x(x-5)X(x-3)