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10 Apr 2017 This section explains how to add and subtract algebra expressions, with several examples.

17 Feb 2012
The core idea in algebra is using letters to represent relationships between numbers without specifying what those numbers are!
If x is 2, then the expression 9 + x has a value of 11. If x is 6, then the expression has a value of 15. So 9 + x is an algebraic expression. In the next few examples,
Evaluate expressions. A variable is a letter, for example x, y or z, that represents an unspecified number. To evaluate an algebraic expression, you have to substitute a number for each variable and perform the arithmetic operations.
In mathematics, an algebraic expression is an expression built up from integer constants, variables, and the algebraic operations For example, 3 x 2 ? 2 x y + c
Expressions and variables. An algebraic expression comprises both numbers and variables together with at least one arithmetic operation. To evaluate an algebraic expression you have to substitute each variable with a number and perform the operations included.
Examples of Algebraic Expressions In an algebraic expression, the variable represents values of a quantity that can vary. We need to define what the variable
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March 2018