3/<1-2>=7/3x+1-3
方程x+1x+2+x+8x+9=x+2x+3+x+7x+8
|X-1|+|X-2|+|X-3|+|X-4|+|X-5|+|X-6|+|X-7|+|X-8|+|X-9|+|X-10|
几道解不等式|x+1|>x|x-1|+|x-2|=7(X^2-2x+1)(x+1)^3(2-x)/[(X+4)(X^2-
1、x-8<3x-2 2、x-2>2x-7
解下列不等式组(1)4x-15>2x-3.5x-7>3x (2)4-3x<3x-2.x+4>3x (3)15x>23x-
(x+2)(x-3)>(-x-3)² -1 (2x-5)(2x+5)<(x-3)(4x+7)
1.3-2x>-3 2x-3>-7 2.2x+5>5x+2 x-1>3x 3.7x-9≥4x-3 6x+7<11x+12
x/(x-1) -1=3/(x-1)(x+2)
1,{3x-2分之x-1<4x-5,x-7分之2>4-5分之x
x-1)(X-2)(x-3)...(x-50)+x(x-2)(X-3)...(X-50)+...+x(x-1)(x-2)
若x满足1-7x<3-5x,-3x>0 化简代数式|x|-|x+1|
(2x-1)/(x-1)(x-2)=(x-5)/(x-2)(x-3) x/2x^2-11x-21=(x+7)/x^2-1