Answer:
[tex]3x+12=57[/tex]
Step-by-step explanation:
Let x represent number of days.
We have been given that Marco earns $3 per day working. So amount earned in x days would be [tex]3x[/tex].
We are also told that Marco already has $12 saved, so total amount saved by Marco in x days would be [tex]3x+12[/tex].
Now we will equate total amount saved by Marco in x days with 57 as Marco needs to save $57 to buy new shoes.
[tex]3x+12=57[/tex]
Therefore, the equation [tex]3x+12=57[/tex] shows the number of days (x) that Marco must work before he can afford the shoes.
