當x等於()時,3(x-1)-(x+1)和3(x+3)相等當k等於()時,2(2x-3)=1-2x與8-k=2(x+1)相等

當x等於()時,3(x-1)-(x+1)和3(x+3)相等當k等於()時,2(2x-3)=1-2x與8-k=2(x+1)相等

3(x-1)-(x+1)=3(x+3)
3x-3-x-1=3x+9
-x-4=9
x=-13
2(2x-3)=1-2x
4x-6=1-2x
x=7/6
代入8-k=2(x+1)
8-k=13/3
k=11/3