![](https://static.youtibao.com/asksite/comm/h5/images/m_q_title.png)
[单选题]
设某数为x,如果这个数的相反数比它的2倍小1,那么列出的方程是()
A.x=2x-1
B.-x=2x-1
C.x-2x=1
D.2x-x=1
![](https://static.youtibao.com/asksite/comm/h5/images/m_q_a.png)
B、-x=2x-1
![](https://static.youtibao.com/asksite/comm/h5/images/solist_ts.png)
A.x=2x-1
B.-x=2x-1
C.x-2x=1
D.2x-x=1
B、-x=2x-1
A.5个有理数相乘,当负因数个数为3个时,积为正
B.有理数相乘应用运算律一定简便
C.-1乘以任何有理数,等于这个数的相反数
D.绝对值大于1的两个数相乘,积比这两个数都大
A.10001
B.10000
C.10011
D.11000
A.1/2 或- 1/2
B.1/4 或- 1/4
C.1/2或- 1/4
D.-1/2或1/4