to be equal in amount or value, or to make things equal in amount or value

I spend a lot one month and not so much the next and in the end it balances out. 我某个月花费很多，但接下来的一个月就没那么多，所以最后也就收支平衡了。

We'd better ask a few men to the party to balance up the numbers. 我们最好叫几个男的去参加晚会，平衡一下男女比例。