(5x+30)-(4x-24)=84
30X-2X=84 5.8X-X=60 6.6X-5X=8 4X-X=24 1.5X-X=1
(5x+30)-(4x-24)=84
x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x
x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?
5/8X-30+3/10X+84=X
2x+3x+4x+5x+x+6x+7x=100
x-4/x-5 - x-5/x-6=x-7/x-8 - x-8/x-9求x=?
提取公因式:已知x*x-5x+1=0 求x*x*x-4x*x-4x-1
x-y+5x-4x= ?
13x-5x(2x-3.3)=24 16-5x(x+1.2)=2x-4 方程解
15x=23x-24 12+5x=3x-8 3(x-3)=9-(x+6)解 4+x=4x-17解
x+(x+24)+(x+4)/2=7x