If ∠5 and ∠6 are a linear pair, m∠5 = (4x-20)°, and m∠6 = x°, then find m∠5. *

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?