Whom would you rather ________ with you, Jim or Jack?
A:have gone
B:have to go
C:have go
D:has to go
一件夹克衫先按成本提高50%标价,再以8折(标价的80%)出售,结果获利20元,若设这件夹克衫的成本是x元,根据题意,可得到的方程是( )