(2x-10)(x-10)·5=500怎么算?

(x+5)^2=10+（x+5)x怎么算 3X+5=2X+10怎么算 asdasd (x+5)²-(x-2)(x-3) =x²+10x+25-(x²-5x+6) *5x怎么来 根号下(5x^2+10x+1)+x^2+2x=7怎么解 5x-4/x-2=4x 10/3x-6-1 怎么解 X 2X 5X 10X=810,怎么解方程 10^x=8 x怎么算? 2X=5X怎么算? X+X-10+X-2=36*3怎么解 3^x=2^x,求x.5^(x-1)·10^3x=8^x求x 10x-3.14*x*x*0.25=3.14*x*x*0.75 怎么算 (x+12)(x-2)+(x+7)(x+8)-(x+5)(x-10),其中x=2