Can anyone me with factoring trinomials ? if you can comment and i'll message you . if you don't know how to factor trinomials then don't comment or answer .

Becca wants to mix fruit juice and soda to make a punch. she can buy fruit juice for $3 a gallon and soda for $4 a gallon. if she wants to make 28 gallons of punch at a cost of $3.25 a gallon, how many gallons of fruit juice and how many gallons of soda should she buy?