15x+13=12x+10 x=?
1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550
X/15 + X/12 + X/10 = 1365,求X,
(x+12)(x-2)+(x+7)(x+8)-(x+5)(x-10),其中x=2
(2x^-5x+2/6x^+13x+6)*(6x^-5x-6/6x^-17x+10)*(12x^+8x-15/2x^-x
x+x=x+15
(X+X)+(X-X)+(X*X)+(X/X)=100
15(x-12)-13x=1020
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
若x=π/3,|x+1|+|x+3|+...+|x+13|-|x+2|-|x+4|-...-|x+12|
如果3x*x-x=1那么9x*x*x*x+12x*x*x-3x*x-7x+2001等于多少
(12x-10)/21+(7x-9)/20=(2-x)/15+(8x-9)/12
已知x/15+x/12+x/10=1365,求x