X-1=2X,问x等于几?

X-1=2X,问x等于几? 1x-1x=0 问X等于几? 4x+x²=5.问,x等于几? 4x+x²=15.问,x等于几? （1+x）乘（1-x）=x 问x等于几 x+1=x+2 x等于几? int x=2; x*7.2/x+1 等于几 X=1 时 (x-1)=3(x+m) m 问M等于几 (x+4)/0.2-(x-1)/0.5=1,问x等于几? 9.6+x=2.5问x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 7x=2 x等于几 2x+1x等于几 已知x减y等于负二;x加y等于1,问x等于几,y等于几. 6x＋6x＝12x 问1X等于几 x加y的和,除以x后等于2,问x除以y等于几? |X|=-x x等于几?为什么