Please help I just need to finish these questions

Which equation represents the partial sum of the geometric series?

Beth makes batches of bluberry muffins and banna muffins. each batchis 6 muffins. she makes 2.5 batches of bluberry muffins. how many batches of bananna muffins should beth make if she wants to have a total of 60 muffins?

Two times a number plus three times another number equals 4. three times the first number plus four times the other number is 7. find the numbers