CSEC Mathematics · January 2006 · Paper 2 · Question 3(b)(iii)

On a certain day, 300 customers visited a bakery that sells bread and cakes. 70 customers bought cakes only, 80 customers bought neither bread nor cakes, 2x customers bought bread only, and x customers bought both bread and cakes. U represents the set of customers visiting the bakery on that day, B represents the set of customers who bought bread, and C represents the set of customers who bought cake.

Calculate the number of customers who bought bread ONLY.