(1)選C
3-2分之1-x=0
乘以2得
6-(1-x)=0
6-1+x=0
(2)選D
3分之1-2分之x-1=1
乘以6得
2-3(x-1)=6
2-3x+3=6
-3x=6-5
x=-1/3
(3)填:15
3x5=15
(4)填:3(3x+1)-(x-1)=6
2分之3x+1-6分之x-1=1
乘以6得
3(3x+1)-(x-1)=6
(1)選C
3-2分之1-x=0
乘以2得
6-(1-x)=0
6-1+x=0
(2)選D
3分之1-2分之x-1=1
乘以6得
2-3(x-1)=6
2-3x+3=6
-3x=6-5
x=-1/3
(3)填:15
3x5=15
(4)填:3(3x+1)-(x-1)=6
2分之3x+1-6分之x-1=1
乘以6得
3(3x+1)-(x-1)=6