PRECALC QUESTION

Question

A chemist needs to create a 30% HCl solution. (HCl is hydrochloric acid. A "30% HCl solution" contains 30% HCl and the other 70% is water.)

How much of a 90% HCl solution must be mixed with 45 ml of a 20% HCl solution in order to result in a 30% HCl solution?

Round your answer to 2 places after the decimal point (if necessary) and do NOT type any units (such as "ml") in the answer box.

Amount of 90% HCl solution: 

Answer 1

0.90x + 0.20(45) = 0.30(x + 45)

Can you solve for x and answer?