# I'll choose the brainliest answer plus 25 points [18 points for the answer and 18 plus 7 points for the brainliest answer] for those who will answer me so please help me. I'm really having trouble catching up about adding and subtracting rational expressions with dissimilar denominator since I'm always pulled-out in Math class because I always have rehearsals in Glee Club. P.S. I need this until "2015.09.20". But please answer as soon as possible and don't enter absurd answers just to get points or just because you wanted to. Thank you so much. So here are my questions: 1.) How to find the LCD when the other denominator doesn't have a variable or constant like 6x and 3? [3 doesn't have a variable] 2.) How to find the LCD of a binomial? [e.g. 5x - 20 and x - 4] 3.) What are the other things I should know about adding and subtracting rational expressions whether it has similar or dissimilar denominator?

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by KimJongInEXO011494
Are you saying LCM?
LCD - Least Common Denominator or LCM - Least Common Multiple
So yeah. It's either LCM or LCD.