4X+2(11-X)=36 22+2X=36 2X=36-22 2X=14 X=7

(4x+2)/x+(4x-22)/(x-5)=(x-6)/(x-4)+(7x+9)/(x+1) x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少? 1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550 x+2x×10=10x+2x+36 x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x 2x+3x+4x+5x+x+6x+7x=100 已知 X=4- 根号3 求 (X*X*X*X-6X*X*X-2X*X+18X+23) / (X*X-8X+15)的值 5x(x+7)(x+4)=5x(x^2+11X) x+(x+24)+(x+4)/2=7x 27046=2x( )+7x( )+4x( )+6x( ) 2706=2x( )+7x( )+4x( )+6x( ) 47026=4x()+7x()+2x()+6x()