For this case we have to:
If Marty makes $ 7.35 per hour, we have:
![7.35x](https://img.qammunity.org/2020/formulas/mathematics/middle-school/oef5q9p1ks1d9mus5iv7n8w15qybo10tnl.png)
Where the variable "x" represents the number of hours worked by Marty.
We have that last week made $ 193.30
So, we have:
![7.35x = 193.30](https://img.qammunity.org/2020/formulas/mathematics/middle-school/6ox352qzakv5r82ktw5sao7nrfxdqmxdwb.png)
But we must take into account the discounted value of the broken mugs, of $ 12.50.
So:
![7.35x-12.50 = 193.30](https://img.qammunity.org/2020/formulas/mathematics/middle-school/43j9akce811xc9dqvmmksjh7vo1xk0611t.png)
Answer:
![7.35x-12.50 = 193.30](https://img.qammunity.org/2020/formulas/mathematics/middle-school/43j9akce811xc9dqvmmksjh7vo1xk0611t.png)