Maria started her business with $50 in her bank account. At the end of the month, she had + $60 in her account in addition to the initial $50. What was the amount she gained or lost?

She gained $ 10.

Step-by-step explanation:

Given,

The initial amount Maria's account = $ 50

Let x be the additional amount for the month,

So, at the end of the month the balance of account = (50 + x) dollars,

According to the question,

50 + x = 60

⇒ x = 10,

Positive sign shows there is a gain.

Hence, the amount she gained is $ 10.

Step-by-step explanation:

She increased her original amount by 10 dollars.