Tavon has a gift card for 130$ that loses $3 for each​ 30-day period it is not used. He has another gift card for $110 that loses $2.50 for each​ 30-day period it is not used.

a. Write and solve an equation for the number of​ 30-day periods until the value of the gift cards will be equal.
b. What will the value of each card be when they have equal​ value?