4/7X÷1/5=12 .X÷3/5=25/72
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4/7X÷1/5=12 .X÷3/5=25/72
4/7X÷1/5=12 .X÷3/5=25/72
X+1/4X=25
4/7X÷1/5=12 .X÷3/5=25/72
X+1/4X=25
![4/7X÷1/5=12 .X÷3/5=25/72](/uploads/image/z/16399970-26-0.jpg?t=4%2F7X%C3%B71%2F5%3D12+.X%C3%B73%2F5%3D25%2F72)
4/7X÷1/5=12
4/7X=12 ×1/5
4/7X=12/5
x=12/5÷4/7
x=48/35
X÷3/5=25/72
x=25/72 ×3/5
x=5/24
X+1/4X=25
5/4X=25
x=25÷5/4
x=25×4/5
x=20
4/7X=12 ×1/5
4/7X=12/5
x=12/5÷4/7
x=48/35
X÷3/5=25/72
x=25/72 ×3/5
x=5/24
X+1/4X=25
5/4X=25
x=25÷5/4
x=25×4/5
x=20
1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550
x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x
y=(x-1)(x-2)(x-3)(x-4)(x-5)(x-6)(x-7)(x-8)(x-9)(x-10)的导数在x=1
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
设函数f(x)=(x-1)(x-2)(x-3)(x-4)(x-5)(x-6)(x-7)(x-8)(x-9)(x-10),
(1) x-3/x-2 - x-5/x-4=x-7/x-6 - x-9/x-8
1x+2x+3x+4x+5x+6x+7x…+99x=100
(X+2)/(X+1)-(X+4)/(X+3)=(X+6)/(X+5)-(X+8)/(X+7)
解方程 x+2/x+1+x+8/x+7=x+6/x+5+x+4/x+3
(x-1)(x-2)(x-3)(x-4)=(x+5)(x+6)(x+7)求X等于几?
3x(7-2x)+5x(2x-1)=4x(x-3)+5
3x(7-2x)+5x(2x-1)=4x(x-3)+56