In Algebra we use variables (usually letters such as x, y, z) to represent the unknown numbers.
Algebraic expression is a group of numbers, variables, operational symbols, and grouping symbols.
Term is number or a product of number and variable raised to power.
Coefficient of a term is the numerical factor.
In order to simplify the algebraic expression, we combine the like terms by adding the coefficients and multiplying the result by the common variables (the reverse distributive property).
A value of the variable that makes an equation a true statement is called root or solution.
Examples:
Algebraic expression is a group of numbers, variables, operational symbols, and grouping symbols.
Term is number or a product of number and variable raised to power.
Coefficient of a term is the numerical factor.
In order to simplify the algebraic expression, we combine the like terms by adding the coefficients and multiplying the result by the common variables (the reverse distributive property).
A value of the variable that makes an equation a true statement is called root or solution.
Examples:
Addition property of equality:
if a, b, and c are real numbers, then
a=b and a+c=b+c are equivalent equations (equations that have the same solutions).
Here are some examples:
if a, b, and c are real numbers, then
a=b and a+c=b+c are equivalent equations (equations that have the same solutions).
Here are some examples: