Katherine has $140 in the bank and is saving $6 per week. abbie has $462 in the bank, but is spending at a rate of $10 per week. which equation will determine when they will have the same amount of money in the bank?

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?