What is the reason for using "letters" in algebraic problems? Why is such a thing needed?

Basic Algebra - Why Are There Letters in My Math??
Why Are There Letters?
Remember when you had math problems like this: 3 + = 10
This problem could be read, “Three plus something equals 10.”
Algebra uses letters to replace the . [ So the same problem can be written like this: 3 + x = 10
The problem could be read, “Three plus something equals 10.” or “Three plus x equals 10.” The “x” just stands

for “something”. We used x here, but we could use any letter. The letter is called the variable.
In algebra, our goal is to find out what number can replace the variable to make the equation true. In the example above, we know that 3 + 7 = 10. So the answer would be x = 7. (Replacing the x with a 7 makes the equation true.) ]

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Solve equation -7y = 5.74

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Updated 5/16/2015 8:02:08 PM

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-5y = 4.15;

y = 4.15/(-5);

y = -0.83

y = 4.15/(-5);

y = -0.83

Added 5/16/2015 8:02:08 PM

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solve? 3.6x-16=2.2x+8 **Weegy:** Sorry, can't give you an answer for this.
3.6x-16=2.2x+8, subtract 8 to both equation, then subtract 2.2x to both new answers of the equation, you get, 1.4x-24=0 (More)

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Updated 12/23/2014 8:18:45 AM

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How do netiquette skills help in the professional and academic setting? **Weegy:** These skills help in the development of good conversation not only in the academic setting but also in the real life situations. [ Expressing emotions in an appropriate manner, tone considerations and proper consideration of the context will help in maintaining good conversations. ] (More)

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Asked 4/20/2012 9:30:41 PM

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How do netiquette skills help in the professional and academic setting?
**Weegy:** Netiquette is a modern word to describe how well one behaves while communicating via the internet. In the present day due to vast advancements in the field of science and technology internet has become an unavoidable way to communicate. [ So, one have have the basic knowledge about the way he or she is supposed too behave while using internet for social networking sites, etc.
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Asked 4/20/2012 9:22:36 PM

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0.3849 round to nearest hundredth

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Updated 4/24/2012 9:21:06 PM

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