100-3(x+3)=50-x+3
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100-3(x+3)=50-x+3100-3(x+3)=50-x+3100-3(x+3)=50-x+3100-3x-9=50-x+391-3x=53-x38=2xx=19100-3X-9=53-X2X
100-3(x+3)=50-x+3
100-3(x+3)=50-x+3
100-3(x+3)=50-x+3
100-3x-9=50-x+3
91-3x=53-x
38=2x
x=19
100-3X-9=53-X
2X=38
X=19
经计算，x=19
x+3x+x-2+x+x+50%x=188 求x
x-2x+3x-4x+5x.+99x-100x=25求解
2x+3x+4x+5x+x+6x+7x=100
3x=x+100 x=?
x+2x+3x+.+100x
用递归法求y=x-(x*x*x/3!)+(x*x*x*x*x/5!)-(x*x*x*x*x*x*x/7!)+.
3x=x+100 x=50
x/50+3(x+300)/100=300.x=?
(x+x+23+x+50)=3x 怎么解
(x+1)+(x+2)+(X+3).+(x+50)=1325
X+100=3X
3x=100+x
3x=100+x
3x=x+100
3x=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?
1/X(X+1)+1/(X+1)(X+2)+1/(X+2)(X+3).+1/(X+99)(X+100)=