What is the equation of the line that passes through the points (6,8) and (-3,2)

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

Pls never taught i’m really confused and i rlly need

Sophia wrote an equation to represent the revenue of a movie theater for one day. she let x represent the number of child tickets sold and y represents the nunver of adult tickets sold. if a child ticket cost $4, an adult ticket cost $6, and the total revenue for the daybwas $420, which equation could sophia use to represent the number of chikd and adult tickets that were sold?