Answer :
On the first day he did 178 baskets per hour.
How to write an equation that represents the given situation?
We know that at the end of the week, he made a total of 570 baskets in the 3 hours of training.
Then the number of baskets that he did per hour is given by the quotient between the number of baskets and the number of hours:
(570 baskets)/(3 hours) = 190 baskets per hour.
We know that the first day of the week he did 12 baskets less per hour, so we will have:
b = (190 - 12) baskets per hour.
Solving that:
b = 178 baskets per hour.
And on the first day he trained for 3 hours, so taking a product we can get the total:
3h*178 bkts/h = 534 baskets.
If you want to learn more about quotients:
https://brainly.com/question/8952483
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