12x+12=16x
x-o.8x=6 12x-8x=4.8 3x-8=16 7.5x-2x x-0.7x=3.6 求答案
如果3x*x-x=1那么9x*x*x*x+12x*x*x-3x*x-7x+2001等于多少
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
(x+12)(x-2)+(x+7)(x+8)-(x+5)(x-10),其中x=2
解方程:16^x+12^x=9^x
16x=12x解方程
解方程:(x^2+3x+1)/(4x^2+16x-1)-(12x^2+18x-3)/(x^2+3x+1)=2
(x+12)*(x+12)=x*x+360怎么解
X/15 + X/12 + X/10 = 1365,求X,
x/2+x/8+x/12+x/20=1
x=4x=254 5x-x=180 3x+x=16 4x-2x=28 15x-11x=12.8 (12+12*1.5)x
X-20%X=12