Answer:
need to spend $18 more in addition to $12
Explanation:
Given: According to online music store, if you spend $30 or more, you receive 3 songs for free
To find: How much more money need to be spend in addition to $12 to receive three free songs
Solution:
Let x denotes amount to be spend in addition to $12 to receive three free songs
According to question,
![x+12\geq 30\\x\geq 30-12\\x\geq 18](https://img.qammunity.org/2021/formulas/mathematics/high-school/n6v1xhscgokiw8lpomqzjfvu8io9mleuct.png)