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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What is the purpose for leaving decimal values at the end of a number? Why don't we just round everything to the nearest whole number to make it easier?

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What is the purpose for leaving decimal values at the end of a number? Why don't we just round everything to the nearest whole number to make it easier?

Weegy: You want to leave decimals at the end of values so that you avoid rounding error when you carry the value through the rest of the problem.
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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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