请写出一个解为-1,且方程左右两边都含有未知数x的一元一次方程______.
2x=x-1,答案不唯一.
故答案是:2x=x-1.
偏移距
_____ good his English is, he still has a long way to go.[ ]
A. Although
B. Even if
C. Whatever
D. However