2(X十3)=5X求X等于几?

2(X十3)=5X求X等于几? (x-1)(x-2)(x-3)(x-4)=(x+5)(x+6)(x+7)求X等于几? 已知1十x十x^2 十x^3=0,求x十x^2十x^3十x^4+x^5十x^6+x^7十x^8的值 5x-3x=1 求x等于几? x等于几.2 x加八等于二十 5x=1+2,求X等于几 (7X+6)-3X=4*(2X+5)等于几?怎么求? x=2x,求x等于几 x-3分之2-4x+1分之5=1 等于几x等于几 如果4分x十6等于5,那么2x十3= x十2分之3x等于25,求x等于多少? 2x等于5y,2z等于3y求3x等于几z 求x等于几 15-(7-5x)=2x+(11-3x)求x等于几我的问题提错了，应该是：12x-466=98*（48-x）求x等于几 X.(X十1)x(X十2)x(x十3) =360 4-3(2-x)=5x 等于几 3-5/2x=0.5x等于几 2X×(3X－5）×X等于几