[10×（10-x)]-[10×(10-x)]+x=18,怎么解..

x-x*9/10 (x+12)(x-2)+(x+7)(x+8)-(x+5)(x-10),其中x=2 (x-1)/(x+3x+2)+6/(2+x-x)-(10-x)/(4-x) 因式分解(x+1)(x+2)-x-10(x²-x)²-18(x²-x)+72 (x^2-x)^2-18(x^2-x)+72(x+1)(x+2)-x-10 化简|x-5|+|x+10|-|x-15|, |x+5|+|x-7|+|x+10|化简 (X-2)(X+3)+3x+10 因式分解3x*x+11x+10 X+X-10+X+8=100 化简：|x+5|+|x-7|+|x+10| 25％x+x=10 x=? 80%x+30-x=10%x 10x+x*x=40 求x:x(10^x)=100 x^2+10x( )=(x+ )^2 x^2-10x=2-x 2x×x=10,求x