(6%x+60*15%)/12%=600+x
1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550
已知 X=4- 根号3 求 (X*X*X*X-6X*X*X-2X*X+18X+23) / (X*X-8X+15)的值
x/(x/12+x/15)*(x/12-x/15)=60
(2x^-5x+2/6x^+13x+6)*(6x^-5x-6/6x^-17x+10)*(12x^+8x-15/2x^-x
15x=23x-24 12+5x=3x-8 3(x-3)=9-(x+6)解 4+x=4x-17解
X/15 + X/12 + X/10 = 1365,求X,
(x^21+x^15+x^12+x^9+x^6+x^3+1)/(x^2+x+1)
解一元一次方程 x/2+x/6+x/12+x/20+x/30+x/42=6
计算1/[x(x+3)]+1/[(x+3)(x+6)]+.+1/[(x+15)(x+18)]=?
x/2+x/6+x/12+x/20+x/30+x/42=1
x+x=x+15
解方程4x^4+12x^3-x^2-15x-6=0