a 30% solution of fertilizer is to be mixed with a 60% solution to get 150 gallons of 50% solution. how many gallons of 30% and 60% solution should be mixed?

Question

I need to see how to set up the problem as well

Answer 1

a + b = 150 ------> a = 150 - b

30a + 60b = 50(150)

 

30(150 - b) + 60b = 7500

4500 - 30b + 60b = 7500

30b = 3000

b = 100

 

a = 150 - 100 = 50