20-x
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20-x20-x20-x20-x20-xx>4....2020x>4祝你学习进步x>4。…。………X>4xiaoxueshengba20-x5x>20x>4
20-x
20-x
20-x
20-x
20-x<4x
x>4....
20<4x+x
20<5x
x>4
祝你学习进步
x>4 。…。………
X>4
xiaoxueshengba
20-x<4x
5x>20
x>4
通分:x+4/x^2-8x+15,x-5/x^2+x-12,x-3/x^2-x-20
x-20%x=45+20%x
x - 15%x+20%x=23.
x-0.3x-0.5x=20
x+x²=20,x=?
0.88(X+20%X)=X+84
X-30%X+8-X=20
x*x*(1/4)=20x
x(x-20)=x+10
30%x=50%x-20x
16-x^/x^+x-20 约分
20-x
20%x+20%x×30%x-20%x=4.5
(x+20)+x=60+x-(x+20)
x+35 x+35-20 x+35 x+35-20
(X+X*20%)-[(1200-X)-(1200-X)*20%]=40%
X+X*20%-(1200-X)-(1200-X)*20%=40%
(20-2x)(20-2x)x>400 x=?