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The letters in algebra stand for unknown numbers or amounts that you are trying to find out (calculate).
For instance you have 3 things and you want to find out how many you have to add to get 5 things. You call the unknown amount X (or any letter you like) and you use an algebra equation to find the answer. So:
3 + X (the unknown) = 5...and you already know the answer is 2, but when you learn the rules of calculating with algebra, you will be able to find the answers to much more complicated mathematical questions. Basically, you call the unknowns any letter you want, then you make an equation using the numbers you do know, and then you solve the equation.
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Replacing numbers with letters is called?
algebra
What kind of mathematics uses letters instead of numbers?
Algebra makes use of letters and mathematical symbols.
What is the branch of mathematics that uses letters called variables in place of numerals?
Algebra is the branch of mathematics that uses letters called variables in place of numerals. Algebra is an extremely important foundation of every branch of mathematics.
The branch of mathematics that uses letters called variables in place of numerals?
Algebra
A branch of mathematics that use letters to represent numbers called what?
It is algebra that uses letters to represent numbers and also Roman numerals.
