
Algebra is simply a form of mathematics that happens to use letters instead of using numbers. It is also described as an abstract concept in mathematics.
Examples:
 2x + 4
 8
Parts of algebra espression:
 Variable : unknown number by letter.
 Coefficient : a number of variable
 Term : a group that contains variable and coefficient
 Constant : a term without avariable
2x + 4
Anything about algebra :
 where you can find algebra used are accounting, engineering, and architects.
 Variables are useful in that they allow for expressing all the possibilities of a formula.
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