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.) ]

Expert answered|lragland|Points 0|

Question

Asked 4/27/2012 6:33:49 PM

0 Answers/Comments

Rating

There are no new answers.

Explain the difference between the "hundreds place" and the "hundredths place".
Which one represents a larger value? **Weegy:** The hundreds place has a value that is 10000 times as large as te hundredths place, [ for the same digit.
Read more: ] (More)

Question

Expert Answered

Asked 4/20/2012 8:41:05 PM

0 Answers/Comments

Explain the difference between the "hundreds place" and the "hundredths place". Which one represents a larger value?

Question

Not Answered

Updated 1/2/2015 7:37:57 AM

1 Answer/Comment

In a decimal number, the "hundreds place" is three places to the left of a decimal point. The "hundredths place" is two places to the right of a decimal point. So for the number 127.53, there is a 1 in the hundreds place and a 3 in the hundredths place. Therefore the "hundreds" represents a larger value.

Added 1/2/2015 7:37:57 AM

This answer has been confirmed as correct, not copied, and helpful.

Solve equation -7y = 5.74

Question

Expert Answered

Updated 350 days ago|5/16/2015 8:02:08 PM

1 Answer/Comment

-5y = 4.15;

y = 4.15/(-5);

y = -0.83

y = 4.15/(-5);

y = -0.83

Added 350 days ago|5/16/2015 8:02:08 PM

This answer has been confirmed as correct, not copied, and helpful.

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)

Question

Expert Answered

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

1 Answer/Comment

solve the equation and check the solution? 9.3m+6.34=38.30 **Weegy:** 58.962m=3.83 (More)

Question

Expert Answered

Asked 4/23/2012 3:54:54 PM

0 Answers/Comments

24,986,757 questions answered

Points 0 [Total 0] Ratings 0 Comments 0 Invitations 0 Offline

Points 0 [Total 0] Ratings 0 Comments 0 Invitations 0 Offline

There are no comments.