5x-2=8 1/4x=-1/2x+3 10x-3=9 5x-2=7x+8 x=3/2x+16 1-3/2=3x=5/2

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5x-2=8 1/4x=-1/2x+3 10x-3=9 5x-2=7x+8 x=3/2x+16 1-3/2=3x=5/2 4x-2=3-x -7x+2=2x-4 -x=-2/5x+1
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5x-2=8
5x=10
x=2
1/4x=-1/2x+3
1/4x+2/4x=3
3/4x=3
x=4
10x-3=9
10x=12
x=1.2
5x-2=7x+8
5x-7x=2+8
-2x=10
x=-5
x=3/2x+16
x-3/2x=16
-1/2x=16
x=-32
1-3/2=3x+5/2
-1/2-5/2=3x
3x=-3
x=-1
4x-2=3-x
5x=5
x=1
-7x+2=2x-4
2+4=7x+2x
9x=6
x=2/3
-x=-2/5x+1
2/5x-x=1
-3/5x=1
x=-5/3

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 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), x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少? 1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550 （1） x-3/x-2 - x-5/x-4=x-7/x-6 - x-9/x-8 1x()+2x()+3x()+4x()+5x()+6x()+7x()+8x()加9x()+10x()=1980 1X?+2X?+3X?+4X?+5X?+6X?+7X?+8X?+9X?+10X?=1980求?是多少已知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+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 (3-x)/(1-x)-(5-x)/(7-x)+(x^2-x)/(x^2-8x+7)=1