Trevon is making payments on a computer that costs $1548. if he makes 12 equal payments, how much is three of his payments?

The answer is 387. Let's see why.

Step-by-step explanation:

The computer costs $1548. And all the 12 payments are equal.

To find one payment we need to divide the total cost to the number of payments.

Each one of the payments is $129.

To find three payment we simply follow:

129 . 3 = 387

Another solution can be;

Since we are looking for 3 of the payments we can divide it to the total payment

which equals to

And we can find the answer by multiplying it with the cost which gives;

answer: the common difference is -0.10