X^2+(12/X)^2=(12-X-12/X)^2
(x+12)(x-2)+(x+7)(x+8)-(x+5)(x-10),其中x=2
x/2+x/8+x/12+x/20=1
解方程:2x(x-1)-x(3x+2)=-x(x+2)-12
x/2+x/6+x/12+x/20+x/30+x/42=1
解一元一次方程 x/2+x/6+x/12+x/20+x/30+x/42=6
1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550
x*x+2x+x*x+10x+x*x+25+2x+x*x+1+1+16+x*x+4x*x+9-12x+16x*x+4-1
(2x^-5x+2/6x^+13x+6)*(6x^-5x-6/6x^-17x+10)*(12x^+8x-15/2x^-x
若x=π/3,|x+1|+|x+3|+...+|x+13|-|x+2|-|x+4|-...-|x+12|
-x^2+7x-12
解方程(6x+12)/(x^2+4x+4) + (x^2-4x+4)/(x^2-4) =(x^2-4)/(x^2-4x+
解分式方程(5-2x)/(x^2-x-12)=5x/(x^2+x-6)+(10-7x)/(x^2-6x+8)得