This week we are still learning adding, subtraction, multiplying and dividing rational expressions, the calculation with the denominators. In addition, we learned about applications of rational expressions which is to solve practical problems with expressions.
Here’s an question that I need to use an equation to solve. It is asking for the amount of bleach that should be added into 47L water. I firstly assumed that the amount of bleach that we are adding is X. Then I thought about the relationships between water and added bleach and the final 6% of bleach in water. I came up with the equation as listed. Then I solve it and I got 3 L of adding bleach.