SOLUTION: add or subtract as indicated. Simplify if possible:
3y/4y-20+9y/6y-30
Please help!!
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Question 183372This question is from textbook
: add or subtract as indicated. Simplify if possible:
3y/4y-20+9y/6y-30
Please help!!
This question is from textbook
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
Start with the given expression
Factor to get
Factor to get
Notice how the LCM (or LCD) is (note: most often, you can find the LCD by multiplying the denominators and removing any repeated terms)
So the goal is to get EVERY denominator equal to the LCD
Multiply the first fraction by
Multiply
Multiply the second fraction by
Multiply
Now that the denominators are equal, we can combine them:
Add the fractions
Combine like terms.
Reduce to get
Distribute
=============================================
Answer:
So simplifies to
In other words, where
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