Changing Scales in Scale Drawings- (question in picture attachment)

Afamily of five rents a kayak and splits the total time, k, equally. each family member spent less than 25 minutes kayaking. which values can be used to complete the math sentence below so that it accurately represents the situation? intro done

X+ y = 5 ; x - y =3 solve using linear combination

Find an bif a = {3, 6, 9, 12) and b = {2, 4, 6, 8, 10).