If the bakery already has 76 liters of peanut butter batter, how many liters of chocolate batter will be needed to make the swirl batter?

Question

A bakery makes its popular swirl brownie by mixing two kinds of batter. The peanut butter batter costs $2.10 per liter, and the chocolate batter costs $1.60 per liter. When they are mixed together to create the swirl batter, it ends up costing $2.00 per liter. 

Answer 1

2.1(76)+ 1.6c = 2(76 + c)

 

Solve for c for your answer.