x*9+x*36+4x*12

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 1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550 |X-1|+|X-2|+|X-3|+|X-4|+|X-5|+|X-6|+|X-7|+|X-8|+|X-9|+|X-10| x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少? 如果3x*x-x=1那么9x*x*x*x+12x*x*x-3x*x-7x+2001等于多少 5x+9x=6x*2+12 x+9-x/3=4 X 7 X - X 7 X = X 9 8 X 9 X - X 9 X = 4 9 x-4/x-5 - x-5/x-6=x-7/x-8 - x-8/x-9求x=? 4x+9x=13x 方程9X-12=60+7X的解是?A.X==4 B.X=12 C.X=24 D.X=36 如果3x^3-x=1,求9x^4+12x^3-3x^2-7x+1 4x+2*（12-x)=36