3(x+1)/0.2=5(x-1)/0.6等於幾

題目：

3(x+1)/0.2=5(x-1)/0.6等於幾

解答：

3(x+1)/0.2=5(x-1)/0.6
3(x+1)/2=5(x-1)/6
9(x+1)=5(x-1)
9x+9=5x-5
4x=-14
x=-7/2