0.5x÷128×6=7
1. x+0.5x=6 4x+16=40 x/5=32% x-4/9x=10/21 x-1/8x=5/8 7x÷2=2.
((x²-5x+6)/(12-7x+x²))²÷((x²+3x+2)/(x
150.5x -4x +0.5x =7
6x+3=7x(x+5)
X*(X-6)=-7 求出X的值
0.3(x+4)=120 (x-25)÷6=7 8(x-12)=144 (x+9)÷3=13 12x-12=0 0.5(
先化简,再求值:3x^3-[x^3+(6x^2-7x)]-2(x^3-3x^2-4x),其中x=-1/3
|X-1|+|X-2|+|X-3|+|X-4|+|X-5|+|X-6|+|X-7|+|X-8|+|X-9|+|X-10|
计算:(x-y)^7÷(y-x)^6+(-x-y)^3÷(x+y)^2
计算:(7x^2-6x^2+3x)÷3x=
x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?
解方程4X-3(20-X)=6X-7(11-X)