(8/10)+(x/15)=(8/12)+[(8-x)/15]
1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550
(2x^-5x+2/6x^+13x+6)*(6x^-5x-6/6x^-17x+10)*(12x^+8x-15/2x^-x
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+12)(x-2)+(x+7)(x+8)-(x+5)(x-10),其中x=2
(12x-10)/21+(7x-9)/20=(2-x)/15+(8x-9)/12
15x=23x-24 12+5x=3x-8 3(x-3)=9-(x+6)解 4+x=4x-17解
2x-10=15x+30,6x-6=6x+2,9-3x=2x-8,5x=9x-50 ,5y-5=12-6y,15x-9=
(8/10)+(x/15)=(8/12)+[(8-x)/15]
解方程(x/x(x+2))+(x/(x+2)(x+4))+.+x/(x+8)(x+10)=1
11x+0.5=15x-0.7 5x+12=8x+3
求方程5x-(24-x)-[8×(30-X)-2×(x-15)]=10的解
4X²-3X=0 4X²-25=0 9X²+12X+4=0 15X²+6=X+8