2x+42°=5x-105° x等于?
5x-2=3x+4 x等于什么?
x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?
x+2x-3x-4x+5x+6x-7x.-196x+197x+198x-199x-200x 等于多少
2x(5x+3)=3x(5x+3x)中x等于多少
2(x+5)^2-(x+6)^2-(x+2)(x-2)=42 (2x+1)(x-3)-(2x+3)(x-1)大于等于12
(x-1)(x-2)(x-3)(x-4)=(x+5)(x+6)(x+7)求X等于几?
5/2x-x等于15/4
2点5x等于42减x
当x等于九时,5x+2x+=( ),5x-2x=( )
x²-2x+1=0 x等于?
x-5x+5/3x-1/2 等于多少、
5x+2=3x,x等于多少