3X+(100-X)÷2=100
2x+3x+4x+5x+x+6x+7x=100
(X+X)+(X-X)+(X*X)+(X/X)=100
1X+2X+3X…+98X+99X+100X=50500X X等于多少?
1x+2x+3x+4x+5x+6x+7x…+99x=100
解方程:2x+4x+6x...+100x=1-(x+3x+5x+...+99x)
3x=2(100-x)
x-2x+3x-4x+...+99x-100x=25
1+x+x^2+x^3+.+x^99+x^100
已知x^4+x^3+x^3+x^2+x^1+1=0,求x^100+x^99+x^98+x^97+x^96的值
先化简再求值(x+3x+5x+7x+.+101x)-(2x+4x+6x+...100x),其中x=51分之2
3X+(100-X)÷2=100
5x+3=x-4,4y+11=22,11x+68-2x=100-9x,0.1x/0.2-(0.27x+0.18)/0.0