Question

Amy mixes 12 liters of 26% acid solution with a 40% acid solution to make a 33% acid solution.

How many liters of 40% solution did she use?



36 liters

12 liters

16 liters

4.8 liters

Please help!!!!!!!!

Answer 1

Let x= the number of liters of the 40% solution.

So the total amount of solution is 12 liters + x

So 12 liters of 26% solution plus a x amount of 40% solution will equal the total amount of solution of 33% solution.

12(.26) + x(.40) = (12+x)(.33)

Solve for x.