x-x=x,x等于几x-x=x,x是几

x-x=x,x等于几x-x=x,x是几 |X|=-x x等于几?为什么 0.8x+x=108等于几x＝几 x是等于几 0=-5x x等于几 x²=225 x等于几? 1000x=10000 x等于几 0.8x+x=108等于几 7x=2 x等于几 4x-x等于几 7x*x等于几 (x-1)(x-2)(x-3)(x-4)=(x+5)(x+6)(x+7)求X等于几? x*x=100x=几 300x=90 x=?求x等于几 x+5x=6,x等于几 如果x=-x那么x等于几? 2.6x+x=4.32.x等于几?要过程 4x+x²=5.问,x等于几?