20[1/X+1/(X+30)]=1 怎么解,
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20[1/X+1/(X+30)]=1怎么解,20[1/X+1/(X+30)]=1怎么解,20[1/X+1/(X+30)]=1怎么解,两边同时乘以x(x+30)有20*[（x+30）+x]=x*(x+3
20[1/X+1/(X+30)]=1 怎么解,
20[1/X+1/(X+30)]=1 怎么解,
20[1/X+1/(X+30)]=1 怎么解,
两边同时乘以x(x+30)有
20*[（x+30）+ x ] = x*(x+30)
x*x - 10*x - 20*30 = 0
(x-30)*(x+20) = 0
x=30 或-20
x/6+x/12+x/20+x/30=1
(x^2-3x+1) (x^2+3x+2)( x^2-9x+20)= -30求X
x*x*(1/4)=20x
X(X-1)=X
1/x+1/x-30=1/20 x=?
x/1+x-30/1=20/1 x=?
x/2+x/8+x/12+x/20=1
20x=30(x-1)
x/2+x/6+x/12+x/20+x/30+x/42=1如题,解方程,在线等
X/2+X/6+X/12+X/20+X/30+X/42=1用简便方法解
解方程(x^2-3x+1)(x^2-3x+2)(x^2-9x+20)=-30
解方程X(X+1)-X(X-3)=2(X+1)(X-1)+20
x(x+1)²-x(x²-3)-2(x+1)(x-1)=20
2x(x-1)-x(3x+2)=(-x-1)(x+6)-20
40%x+21=37x-78%x=2.2x+30%x=26(1-25%)x=1540%x-30=152x+20%x=3.3怎么列式计算jijiji40%x+21=37x-78%x=2.2x+30%x=26(1-25%)x=1540%x-30=152x+20%x=3.3
x>=1,x
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,