A prescription calls for 200 mg of a drug that you have in a 10mg/15 mL concentration. How many mL of the liquid do you need?

Question

Can someone answer this question in an algebraic equation?

Answer 1

15 ml is to 10 mg as x ml is to 200 mg

 

15:10::x:200

 

10x = 15(200)

 

10x = 3000

 

x = 300 ml