Answer :

julianbae806
To simplify we add 7t plus 8t which then we get 15t + 4

Using Addition, the total earnings were 15t+4.

What is Addition?

The addition is "taking two or more numbers and adding them together".

According to the question,

Earning on Monday = 7t - 1

Earning on Tuesday = 8t + 5

To get total earnings only by adding two earnings

(7t - 1) + (8t + 5) = 15t +4

Hence, total earnings were 15t+4,

To learn more about Addition here

https://brainly.com/question/16505812

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