(180-x)*15=12*x.
(180-x)*15=12*x.
X/15 + X/12 + X/10 = 1365,求X,
x=4x=254 5x-x=180 3x+x=16 4x-2x=28 15x-11x=12.8 (12+12*1.5)x
x+x=x+15
1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550
x/(x/12+x/15)*(x/12-x/15)=60
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
(5X-15)-(2X+3)=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
已知x -2x=5,求代数式x四次方+3x³-12x² -31x-15
15(x-12)-13x=1020
解方程 x+4/11x=75 x-1/4x=120 3x+12x=180 8x-x=175