(1/5X)(X-0.3)=0.6
(1/5X)(X-3/10)=0.6
1-1/5X=0.6
4/5x= 0.6
x=0.6x5/4
x=0.2
[(5x-1)/(5x-2)](x-0.3)=0.6
(5x-1)(x-0.3)=0.6(5x-2)
5x²-2.5x+0.3=3x-1.2
5x²-5.5x+1.5=0
10x²-11x+3=0
用十字相乘得:(2x-1)(5X-3)=0
解得,X1=1/2 ,X2=3/5
x=0.6
步骤:2x-0.6=3x-1.2
-x=-0.6
x=0.6