Marco needs $57 to buy new basketball shoes. if marco earns $3 per day working and already has $12 saved, which equation shows how many days marco must work before he can afford the shoes?

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 .

We are also told that Marco already has $12 saved, so total amount saved by Marco in x days would be .

Now we will equate total amount saved by Marco in x days with 57 as Marco needs to save $57 to buy new shoes.

Therefore, the equation shows the number of days (x) that Marco must work before he can afford the shoes.

the answer is b.)

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it is contrapositive

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