Learn math, science, English SAT & ACT from
highquaility study
videos by expert teachers
Thank you for watching the preview.
To unlock all 5,300 videos, start your free trial.
Adding and Subtracting Rational Expression  Problem 5
Alissa Fong
Alissa Fong
MA, Stanford University
Teaching in the San Francisco Bay Area
Alissa is currently a teacher in the San Francisco Bay Area and Brightstorm users love her clear, concise explanations of tough concepts
A common type of word problem in math is called a "work" word problem, where you're asked to find the total time it takes for two individuals to finish a job together, or perhaps if you know the time together, then how long it would take one individual. One way to set up a rational equation to solve this is to write the part person 1 can do in one hour times total time, plus the part person 2 can do in one hour times the total time, and set it equal to one. You'll need to find a common denominator and simplify the left side, but you can use this set up to solve for any variable in this scenario.
Transcript Coming Soon!
Please enter your name.
Are you sure you want to delete this comment?
Alissa Fong
M.A. in Secondary Mathematics, Stanford University
B.S., Stanford University
Alissa has a quirky sense of humor and a relatable personality that make it easy for students to pay attention and understand the material. She has all the math tips and tricks students are looking for.
Sample Problems (6)
Need help with a problem?
Watch expert teachers solve similar problems.

Adding and Subtracting Rational Expression
Problem 1 7,278 viewsAdd and Simplify:
3x² + 6x x + 2 x + 2 
Adding and Subtracting Rational Expression
Problem 2 6,344 viewsSimplify:
7m − 2 − 5m − 6 m² + 3m + 2 m² + 3m + 2 
Adding and Subtracting Rational Expression
Problem 3 6,052 viewsSimplify:
4 + x² + x x + 3 x² + 4x + 3 
Adding and Subtracting Rational Expression
Problem 4 5,228 viewsSimplify:
x − x x² − 16 x² + 8x + 16 
Adding and Subtracting Rational Expression
Problem 5 682 views 
Adding and Subtracting Rational Expression
Problem 6 270 views
Comments (0)
Please Sign in or Sign up to add your comment.
·
Delete