A group of 48 people is traveling to a nature preserve in small and/or large vans. A small van holds 8 people and a large van holds 12 people. Define your variables and write an equation in standard form that models the number of small and large vans that your group could use

If there are x small vans and y large vans, then

8x+12y = 48
or,
2x+3y = 12