中一題目 請解答

x+2(x-1)=1

x+2x-2=1

x+2x=1+2

3x=3

x=1

x+2(x-1)=1
x + 2x-2 = 1
3x-2 = 1
3x-2+2 = 1+2-----(兩邊都減2)
3x = 3
3x/3 = 3/3-----(兩邊都除3)
x = 1

2006-11-22 00:43:34 補充：
錯了,是加2才對3x-2 2 = 1 2-----(兩邊都加2)

x+2(x-1)=1
x + 2x - 2 = 1
3x = 1 + 2
3x = 3
x = 1

x+2(x-1)=1
x+2x-2=1
3x=1+2
3x=3
x=1
It is not so difficult...

x+2x-2=1
3x =3
x =1

x+2(x-1)=1
x+2x-2=1
3X=1+2
3x=3
x=3/3
x=1

3x - 2 = 1

x = 1

x+2(x-1)=1
x+2x-2=1
3x=3
x=1

x+2x-2=1
3x=1+2
x=1