The number of DVDs sold at a store in a month was 925 and the number of DVDs sold decreased by 12 per month. The number of Blu-ray discs sold in the same store in the same month was 507 and the number of Blu-ray discs sold increased by 26 per month. Let d represent the number of discs sold and t represent the time in months. Write a system of equations by filling in the blanks:

d = Response area t + Response area

d = Response area t+ Response area

Solve the system of equations using the subsitution method. Complete the sentence to describe the solution.

There will be Response area DVDs and Blu-Ray discs sold per month in Response area months.