Question

Alonzo's Coffee Shop makes a blend that is a mixture of two types of coffee. Type A coffee costs Alonzo $4.20 per pound, and type B coffee costs $5.70 per pound. This month's blend used twice as many pounds of type B coffee as type A, for a total cost of $468.00 . How many pounds of type A coffee were used?

Answer 1

B=2A
4.2A+5.7(2A)=468
15.6A=468
A=30 pounds