10%x+25%(10-x)=13% 求

10%x+25%(10-x)=13% 求 X/15 + X/12 + X/10 = 1365,求X, 3^x=2^x,求x.5^(x-1)·10^3x=8^x求x 求未知数:x：x=10 y=根号(x²-2x+10)+根号（x²-6x+13） 求y值域 X定义域 1X?+2X?+3X?+4X?+5X?+6X?+7X?+8X?+9X?+10X?=1980求?是多少 求函数y=\x-1\+\x-2\+\x-3\+\x-4\+\x-5\+\x-6\+.+\x-10\的最小值 已知x=9/2 求:[(x^+7x+10)/(x^2+6x+5)]×[(x^3+1)/(x^2 求x 的值.x +3.5x =9.9;4.25x -x =4.55;10x -2.7x =58.4;6.8x +3.2x 已知x=100,求x(x+1)分之1+(x+1)(x+2)分之1+(x+2)(x+3)分之1+.+(x+99)(x+10 f(x)=1/(x+1)(x+2)+1/(x+2)(x+3)+1/(x+3)(x+4)+.1/(x+9)(x+10) 求 3/10(200+x)-2/10(300+x)=300x9/25,求x.