(7X+6)-3X=4*(2X+5)等于几?怎么求?
(x-1)(x-2)(x-3)(x-4)=(x+5)(x+6)(x+7)求X等于几?
15-(7-5x)=2x+(11-3x)求x等于几
5x-3x=1 求x等于几?
x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?
3x+1=5x+2=7x+4=13x+6 求x等于多少?
5x=1+2,求X等于几
x=2x,求x等于几
y*y*y*y+2x*x*x*x=4x*x*y 求x等于几,y等于几,写出所有选项!
x+2x-3x-4x+5x+6x-7x.-196x+197x+198x-199x-200x 等于多少
2x-5y=7 2x+3y=1 求x,y等于几
x除以3分之2除以5分之4等于120求x等于几?
已知1+x+x^2+x^3=0,求x+x^2+x^3+x^4+x^5+x^6+x^7+x^8的值