3x+(100-x)=300 ,
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(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
x/50+3(x+300)/100=300.x=?
3x=x+100 x=?
3x+2(100-x )=300
3x+(100-x)=300
3x+(100-x)=300 ,
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)=
1x+2x+3x+4x+5x+6x+7x…+99x=100
100×2x+10x+3x+216=100×3x+10×2x+x