100X=80(X+2)
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100X=80(X+2)100X=80(X+2)100X=80(X+2)100X=80(X+2)100X=80X+160100X-80X=16020X=160X=160/20X=8解方程？100x=8
100X=80(X+2)
100X=80(X+2)
100X=80(X+2)
100X=80(X+2)
100X=80X+160
100X-80X=160
20X=160
X=160/20
X=8
解方程？
100x=80x+160
移项合并：20x=160
系数化为1：x=8
100x=80x+160 20x＝160 x＝8
（X+X)+(X-X)+(X*X)+(X/X)=100
x-2x+3x-4x+5x.+99x-100x=25求解
2x+3x+4x+5x+x+6x+7x=100
2X/(X/80+X/100）=
80（X+2）=100X
100X=80(X+2)
80x+20=100-2x
1/X(X+1)+1/(X+1)(X+2)+1/(X+2)(X+3).+1/(X+99)(X+100)=
解方程：2x+4x+6x...+100x=1-(x+3x+5x+...+99x)
1X+2X+3X…+98X+99X+100X=50500X X等于多少?
1x+2x+3x+4x+5x+6x+7x…+99x=100
100(X - 2) + 10X + 2X = 100*2X + 10X + X - 2 - 495
100×2x+10x+3x+216=100×3x+10×2x+x
设函数f(x)=(x-1)(x-2)...(x-100)(x>100),求F'(X)
f(x)=x(x-1)(x-2)…(x-99)(x-100),求f'(100)
解方程:x-2x+3x-4x+...+99x-100x=25
解方程：x-2x+3x-4x+.+99x-100x=25
x-2x+3x-4x+...+99x-100x=25