2-2/3X=X3/2
3x/2+2/3x+2=0
3x^2/2+2x+2/3=0
9x^2+12x+4=0
(3x+2)^2=0
3x+2=0
x1=x2=-2/3
3X-（x-1)=5
3x-x+1=5
2x=4
x=2
1-38x-2/19=2-3x/3
1-38x-2/19=2-x
x-38x=1/8-1
-37x=-7/8
x=7/296
3x-3x-1/4=X/6
x/6=-1/4
x=-1/4*6
x=-8.4
3/4x-1=3x+4
3/4-x=3x^2+4x
3x^2+5x-3/4=0
12x^2+20x-3=0
万能公式解出x1、x2即可.