9th grade algebra 1 ? ?

write a system of equations to describe the situation below, solve using elimination, and fill in the blanks.

karlene likes to make desserts for bake sales. last month, she made 3 batches of brownies and 2 batches of cookies, which called for 13 eggs total. the month before, she baked 3 batches of brownies and 3 batches of cookies, which required a total of 15 eggs. how many eggs did karlene use for a batch of each dessert?

karlene uses eggs to make a batch of brownies and eggs to make a batch of cookies.