### Home > PC3 > Chapter 7 > Lesson 7.1.2 > Problem7-26

7-26.

Your science teacher needs to prepare a solution that is $60\%$ acid for your upcoming class experiment. The problem is that the company your teacher orders supplies from messed up the last order. They sent $45\%$ and $65\%$ acid solutions instead of $60\%$. Your science teacher needs your math help! If you start with $350$ mL of the $45\%$ solution, how much of $65\%$ solution must be added to end up with the $60\%$ solution needed for the experiment? Homework Help ✎

$350\left(0.45\right)+x\left(0.65\right)=\left(350+x\right)\left(0.60\right)$