2X+X+20=110.X等于几?jikuai

2X+X+20=110.X等于几?jikuai 7x=2 x等于几 |X|=-x x等于几?为什么 x-x=x,x等于几x-x=x,x是几 7x-5x=20 那么,x等于几 x+1=x+2 x等于几? x=2x,求x等于几 2x=4-x,x等于几 X-1=2X,问x等于几? x^2+7x+10=0 x等于几? int x=2; x*7.2/x+1 等于几 (x-1)(x-2)(x-3)(x-4)=(x+5)(x+6)(x+7)求X等于几? x-3分之2-4x+1分之5=1 等于几x等于几 0.8x+x=108等于几x＝几 ：x除以2y等于100x x等于几? 2x加3x等于30 x等于几 0=-5x x等于几 x²=225 x等于几?