Solving Rational Equations 7 - Proportions 2
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Lesson Summary:
In this lesson, we learn how to solve rational equations that are proportions. We are reminded that we need to multiply both sides by the least common denominator to get an equation without fractions. We are also shown how to alter non-proportion rational equations slightly to make them look like proportions. Additionally, we see how to solve quadratic equations that result from simplifying proportions, with the reminder that we can never have a zero in the denominator.
Lesson Description:
Shows how to solve Rational Equations that are proportions.
More free YouTube videos by Julie Harland are organized at http://yourmathgal.com
Questions answered by this video:
- What is a rational equation?
- How do you solve equations with fractions in them?
- How do you solve equations when x is in the numerators and denominators of the fractions?
- How do you check your solution to a rational equation?
- How do you solve rational equations with proportions?
- How do you solve proportions with variables in them?
- How do you solve the proportion (x - 6)/3 = x/5?
- How do you solve 2x/(x + 2) - 5 = 7x/(x + 2)?
- How do you solve x/(x + 12) = 1/(x + 5)?
- What happens if you get a quadratic equation when you cross multiply in an algebraic proportion?
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Staff Review
This lesson picks up from where the previous lesson left off. The problem at the end of that lesson is solved and checked with all steps shown. Several algebraic proportions are solved, checked, and explained in this video.
