SOLUTION: A experiment calls for 40 gallons of a 70% saline solution. You only have a 80% saline solution and a 40% saline solution. Let x represent the amount of 80% saline solution and y r

Question 1133840: A experiment calls for 40 gallons of a 70% saline solution. You only have a 80% saline solution and a 40% saline solution. Let x represent the amount of 80% saline solution and y represent the amount of 40% saline solution, what is the equation that describes the total amount of pure saline in the solution?
Answer by addingup(3677) (Show Source): You can put this solution on YOUR website!
0.8x + 0.4(40-x) = 0.7(40)
0.8x + 16 - 0.4x = 28
0.4x = 12
x = 30 You need 30 gallons of the 80% solution and 40-30 = 10 gallons of the 40% solution
RELATED QUESTIONS
You need a 40%saline solution for an experiment, but only have 25% saline and 75% saline (answered by stanbon,josmiceli)

Gabriel needs a 30% saline solution for a science experiment he has solutions that are... (answered by josgarithmetic)

How much water must be evaporated from 400 gallons of a 14% saline solution to get a 40%... (answered by vleith)

a 60% saline solution is to be mixed with an 80% saline solution to get 40 liters of a... (answered by TimothyLamb)

How many gallons each of a 25% saline solution and a 35% saline solution must be mixed... (answered by ikleyn)

How many liters(L) of a 10% saline solution must be added to a 40 L of a 20% saline... (answered by richwmiller)

how many liters of a 10% saline solution must be added to 4 liters of a 40% saline... (answered by stanbon)

How man L of a 10% saline solution must be added to 40 L of a 20% saline solution to... (answered by nerdybill)

how many liters of a 30% saline solution must be mixed with a 40% saline solution to... (answered by nerdybill)